diff --git a/apps/theming/css/settings-admin.scss b/apps/theming/css/settings-admin.scss
index ceb560f0f02fd..7753540ccd27c 100644
--- a/apps/theming/css/settings-admin.scss
+++ b/apps/theming/css/settings-admin.scss
@@ -28,7 +28,7 @@
         visibility: hidden;
     }
     form.uploadButton {
-        width: 356px;
+        width: 411px;
     }
     form .theme-undo,
     .theme-remove-bg {
@@ -46,13 +46,17 @@
     input[type='text']:hover + .theme-undo,
     input[type='text'] + .theme-undo:hover,
     input[type='text']:focus + .theme-undo,
-    input[type='text']:active + .theme-undo {
+    input[type='text']:active + .theme-undo,
+    input[type='url']:hover + .theme-undo,
+    input[type='url'] + .theme-undo:hover,
+    input[type='url']:focus + .theme-undo,
+    input[type='url']:active + .theme-undo{
         visibility: visible;
     }
 
     label span {
         display: inline-block;
-        min-width: 120px;
+        min-width: 175px;
         padding: 8px 0px;
         vertical-align: top;
     }
@@ -88,7 +92,7 @@
         background-size: cover;
         background-position: center center;
         text-align: center;
-        margin-left: 123px;
+        margin-left: 178px;
         margin-top: 10px;
         margin-bottom: 20px;
         cursor: pointer;
@@ -117,4 +121,4 @@
         background-repeat: no-repeat;
         background-size: contain;
     }
-}
\ No newline at end of file
+}
diff --git a/apps/theming/js/settings-admin.js b/apps/theming/js/settings-admin.js
index 25ac092a96417..76d9fb965ca56 100644
--- a/apps/theming/js/settings-admin.js
+++ b/apps/theming/js/settings-admin.js
@@ -83,7 +83,8 @@ function hideUndoButton(setting, value) {
 		url: 'https://nextcloud.com',
 		color: '#0082c9',
 		logoMime: '',
-		backgroundMime: ''
+		backgroundMime: '',
+		imprintUrl: ''
 	};
 
 	if (value === themingDefaults[setting] || value === '') {
@@ -175,7 +176,7 @@ $(document).ready(function () {
 		var el = $(this);
 	});
 
-	$('#theming input[type=text]').change(function(e) {
+	function onChange(e) {
 		var el = $(this);
 		var setting = el.parent().find('div[data-setting]').data('setting');
 		var value = $(this).val();
@@ -186,14 +187,14 @@ $(document).ready(function () {
 			}
 		}
 		if(setting === 'name') {
-      if(checkName()){
-        $.when(el.focusout()).then(function() {
-          setThemingValue('name', value);
-        });
-        if (e.keyCode == 13) {
-          setThemingValue('name', value);
-        } 
-      }
+			if(checkName()){
+				$.when(el.focusout()).then(function() {
+					setThemingValue('name', value);
+				});
+				if (e.keyCode == 13) {
+					setThemingValue('name', value);
+				}
+			}
 		}
 
 		$.when(el.focusout()).then(function() {
@@ -202,7 +203,10 @@ $(document).ready(function () {
 		if (e.keyCode == 13) {
 			setThemingValue(setting, value);
 		}
-	});
+	};
+
+	$('#theming input[type="text"]').change(onChange);
+	$('#theming input[type="url"]').change(onChange);
 
 	$('.theme-undo').click(function (e) {
 		var setting = $(this).data('setting');
diff --git a/apps/theming/lib/Controller/ThemingController.php b/apps/theming/lib/Controller/ThemingController.php
index 421af05199842..27daf756d4806 100644
--- a/apps/theming/lib/Controller/ThemingController.php
+++ b/apps/theming/lib/Controller/ThemingController.php
@@ -161,6 +161,16 @@ public function updateStylesheet($setting, $value) {
 					]);
 				}
 				break;
+			case 'imprintUrl':
+				if (strlen($value) > 500) {
+					return new DataResponse([
+						'data' => [
+							'message' => $this->l10n->t('The given legal notice address is too long'),
+						],
+						'status' => 'error'
+					]);
+				}
+				break;
 			case 'slogan':
 				if (strlen($value) > 500) {
 					return new DataResponse([
@@ -406,6 +416,7 @@ public function getJavascript() {
 		url: ' . json_encode($this->themingDefaults->getBaseUrl()) . ',
 		slogan: ' . json_encode($this->themingDefaults->getSlogan()) . ',
 		color: ' . json_encode($this->themingDefaults->getColorPrimary()) . ',
+		imprintUrl: ' . json_encode($this->themingDefaults->getImprintUrl()) . ',
 		inverted: ' . json_encode($this->util->invertTextColor($this->themingDefaults->getColorPrimary())) . ',
 		cacheBuster: ' . json_encode($cacheBusterValue) . '
 	};
diff --git a/apps/theming/lib/Settings/Admin.php b/apps/theming/lib/Settings/Admin.php
index 7c937f1979090..ef296688ed2ce 100644
--- a/apps/theming/lib/Settings/Admin.php
+++ b/apps/theming/lib/Settings/Admin.php
@@ -84,6 +84,7 @@ public function getForm(): TemplateResponse {
 			'canThemeIcons'   => $this->themingDefaults->shouldReplaceIcons(),
 			'iconDocs'        => $this->urlGenerator->linkToDocs('admin-theming-icons'),
 			'images'		  => $this->imageManager->getCustomImages(),
+			'imprintUrl'      => $this->themingDefaults->getImprintUrl(),
 		];
 
 		return new TemplateResponse('theming', 'settings-admin', $parameters, '');
diff --git a/apps/theming/lib/ThemingDefaults.php b/apps/theming/lib/ThemingDefaults.php
index 2e6b667b1f66f..d2f5747124235 100644
--- a/apps/theming/lib/ThemingDefaults.php
+++ b/apps/theming/lib/ThemingDefaults.php
@@ -141,12 +141,26 @@ public function getSlogan() {
 		return \OCP\Util::sanitizeHTML($this->config->getAppValue('theming', 'slogan', $this->slogan));
 	}
 
+	public function getImprintUrl() {
+		return $this->config->getAppValue('theming', 'imprintUrl', '');
+	}
+
 	public function getShortFooter() {
 		$slogan = $this->getSlogan();
 		$footer = '<a href="'. $this->getBaseUrl() . '" target="_blank"' .
 			' rel="noreferrer noopener">' .$this->getEntity() . '</a>'.
 			($slogan !== '' ? ' – ' . $slogan : '');
 
+		$imprintUrl = (string)$this->getImprintUrl();
+		if($imprintUrl !== ''
+			&& filter_var($imprintUrl, FILTER_VALIDATE_URL, [
+				'flags' => FILTER_FLAG_SCHEME_REQUIRED | FILTER_FLAG_HOST_REQUIRED
+			])
+		) {
+			$footer .= '<br/><a href="' . $imprintUrl . '" class="legal" target="_blank"' .
+				' rel="noreferrer noopener">' . $this->l->t('Legal notice') . '</a>';
+		}
+
 		return $footer;
 	}
 
diff --git a/apps/theming/templates/settings-admin.php b/apps/theming/templates/settings-admin.php
index ea9925f3a64f5..26ab78637c911 100644
--- a/apps/theming/templates/settings-admin.php
+++ b/apps/theming/templates/settings-admin.php
@@ -47,8 +47,8 @@
 	</div>
 	<div>
 		<label>
-			<span><?php p($l->t('Web address')) ?></span>
-			<input id="theming-url" type="url" placeholder="<?php p($l->t('Web address https://…')); ?>" value="<?php p($_['url']) ?>" maxlength="500" />
+			<span><?php p($l->t('Web link')) ?></span>
+			<input id="theming-url" type="url" placeholder="<?php p($l->t('https://…')); ?>" value="<?php p($_['url']) ?>" maxlength="500" />
 			<div data-setting="url" data-toggle="tooltip" data-original-title="<?php p($l->t('Reset to default')); ?>" class="theme-undo icon icon-history"></div>
 		</label>
 	</div>
@@ -94,6 +94,13 @@
 	<h2 class="inlineblock"><?php p($l->t('Advanced options')); ?></h2>
 
 	<div class="advanced-options">
+		<div>
+			<label>
+				<span><?php p($l->t('Legal notice link')) ?></span>
+				<input id="theming-imprintUrl" type="url" placeholder="<?php p($l->t('https://…')); ?>" value="<?php p($_['imprintUrl']) ?>" maxlength="500" />
+				<div data-setting="imprintUrl" data-toggle="tooltip" data-original-title="<?php p($l->t('Reset to default')); ?>" class="theme-undo icon icon-history"></div>
+			</label>
+		</div>
 		<div class="advanced-option-logoheader">
 			<form class="uploadButton" method="post" action="<?php p($_['uploadLogoRoute']) ?>" data-image-key="logoheader">
 				<input type="hidden" id="theming-logoheaderMime" value="<?php p($_['images']['logoheader']['mime']); ?>" />
diff --git a/apps/theming/tests/Controller/ThemingControllerTest.php b/apps/theming/tests/Controller/ThemingControllerTest.php
index dda881525f0ca..f2f14e44a02b2 100644
--- a/apps/theming/tests/Controller/ThemingControllerTest.php
+++ b/apps/theming/tests/Controller/ThemingControllerTest.php
@@ -814,6 +814,7 @@ public function testGetJavascript() {
 		url: "",
 		slogan: "",
 		color: "#000",
+		imprintUrl: null,
 		inverted: false,
 		cacheBuster: null
 	};
@@ -848,6 +849,7 @@ public function testGetJavascriptInverted() {
 		url: "nextcloudurl",
 		slogan: "awesome",
 		color: "#ffffff",
+		imprintUrl: null,
 		inverted: true,
 		cacheBuster: null
 	};
diff --git a/apps/theming/tests/Settings/AdminTest.php b/apps/theming/tests/Settings/AdminTest.php
index 4eac689fb3ff8..f7361677d77ef 100644
--- a/apps/theming/tests/Settings/AdminTest.php
+++ b/apps/theming/tests/Settings/AdminTest.php
@@ -81,6 +81,10 @@ public function testGetFormNoErrors() {
 			->expects($this->once())
 			->method('getBaseUrl')
 			->willReturn('https://example.com');
+		$this->themingDefaults
+			->expects($this->once())
+			->method('getImprintUrl')
+			->willReturn('');
 		$this->themingDefaults
 			->expects($this->once())
 			->method('getSlogan')
@@ -105,6 +109,7 @@ public function testGetFormNoErrors() {
 			'canThemeIcons' => null,
 			'iconDocs' => null,
 			'images' => [],
+			'imprintUrl' => '',
 		];
 
 		$expected = new TemplateResponse('theming', 'settings-admin', $params, '');
@@ -130,6 +135,10 @@ public function testGetFormWithErrors() {
 			->expects($this->once())
 			->method('getBaseUrl')
 			->willReturn('https://example.com');
+		$this->themingDefaults
+			->expects($this->once())
+			->method('getImprintUrl')
+			->willReturn('');
 		$this->themingDefaults
 			->expects($this->once())
 			->method('getSlogan')
@@ -154,6 +163,7 @@ public function testGetFormWithErrors() {
 			'canThemeIcons' => null,
 			'iconDocs' => '',
 			'images' => [],
+			'imprintUrl' => '',
 		];
 
 		$expected = new TemplateResponse('theming', 'settings-admin', $params, '');
diff --git a/apps/theming/tests/ThemingDefaultsTest.php b/apps/theming/tests/ThemingDefaultsTest.php
index c943af01c6c51..b454b21f84091 100644
--- a/apps/theming/tests/ThemingDefaultsTest.php
+++ b/apps/theming/tests/ThemingDefaultsTest.php
@@ -195,6 +195,27 @@ public function testGetBaseUrlWithCustom() {
 		$this->assertEquals('https://example.com/', $this->template->getBaseUrl());
 	}
 
+	public function imprintUrlProvider() {
+		return [
+			[ '' ],
+			[ 'https://example.com/imprint.html']
+		];
+	}
+
+	/**
+	 * @param $imprintUrl
+	 * @dataProvider imprintUrlProvider
+	 */
+	public function testGetImprintURL($imprintUrl) {
+		$this->config
+			->expects($this->once())
+			->method('getAppValue')
+			->with('theming', 'imprintUrl', '')
+			->willReturn($imprintUrl);
+
+		$this->assertEquals($imprintUrl, $this->template->getImprintUrl());
+	}
+
 	public function testGetSloganWithDefault() {
 		$this->config
 			->expects($this->once())
@@ -217,12 +238,13 @@ public function testGetSloganWithCustom() {
 
 	public function testGetShortFooter() {
 		$this->config
-			->expects($this->exactly(3))
+			->expects($this->exactly(4))
 			->method('getAppValue')
 			->willReturnMap([
 				['theming', 'url', $this->defaults->getBaseUrl(), 'url'],
 				['theming', 'name', 'Nextcloud', 'Name'],
 				['theming', 'slogan', $this->defaults->getSlogan(), 'Slogan'],
+				['theming', 'imprintUrl', '', ''],
 			]);
 
 		$this->assertEquals('<a href="url" target="_blank" rel="noreferrer noopener">Name</a> – Slogan', $this->template->getShortFooter());
@@ -230,17 +252,62 @@ public function testGetShortFooter() {
 
 	public function testGetShortFooterEmptySlogan() {
 		$this->config
-			->expects($this->exactly(3))
+			->expects($this->exactly(4))
 			->method('getAppValue')
 			->willReturnMap([
 				['theming', 'url', $this->defaults->getBaseUrl(), 'url'],
 				['theming', 'name', 'Nextcloud', 'Name'],
 				['theming', 'slogan', $this->defaults->getSlogan(), ''],
+				['theming', 'imprintUrl', '', ''],
 			]);
 
 		$this->assertEquals('<a href="url" target="_blank" rel="noreferrer noopener">Name</a>', $this->template->getShortFooter());
 	}
 
+	public function testGetShortFooterImprint() {
+		$this->config
+			->expects($this->exactly(4))
+			->method('getAppValue')
+			->willReturnMap([
+				['theming', 'url', $this->defaults->getBaseUrl(), 'url'],
+				['theming', 'name', 'Nextcloud', 'Name'],
+				['theming', 'slogan', $this->defaults->getSlogan(), 'Slogan'],
+				['theming', 'imprintUrl', '', 'https://example.com/imprint'],
+			]);
+
+		$this->l10n
+			->expects($this->any())
+			->method('t')
+			->willReturnArgument(0);
+
+		$this->assertEquals('<a href="url" target="_blank" rel="noreferrer noopener">Name</a> – Slogan<br/><a href="https://example.com/imprint" class="legal" target="_blank" rel="noreferrer noopener">Legal notice</a>', $this->template->getShortFooter());
+	}
+
+	public function invalidImprintUrlProvider() {
+		return [
+			['example.com/imprint'],  # missing scheme
+			['https:///imprint'],     # missing host
+		];
+	}
+
+	/**
+	 * @param $invalidImprintUrl
+	 * @dataProvider invalidImprintUrlProvider
+	 */
+	public function testGetShortFooterInvalidImprint($invalidImprintUrl) {
+		$this->config
+			->expects($this->exactly(4))
+			->method('getAppValue')
+			->willReturnMap([
+				['theming', 'url', $this->defaults->getBaseUrl(), 'url'],
+				['theming', 'name', 'Nextcloud', 'Name'],
+				['theming', 'slogan', $this->defaults->getSlogan(), 'Slogan'],
+				['theming', 'imprintUrl', '', $invalidImprintUrl],
+			]);
+
+		$this->assertEquals('<a href="url" target="_blank" rel="noreferrer noopener">Name</a> – Slogan', $this->template->getShortFooter());
+	}
+
 	public function testgetColorPrimaryWithDefault() {
 		$this->config
 			->expects($this->once())
diff --git a/core/css/guest.css b/core/css/guest.css
index e0e639252eeec..88341fb903a33 100644
--- a/core/css/guest.css
+++ b/core/css/guest.css
@@ -744,6 +744,10 @@ footer .info a {
 	overflow: hidden;
 }
 
+a.legal {
+	font-size: smaller;
+}
+
 /* for low-res screens, use Regular font-weight instead of Light */
 @media (-webkit-max-device-pixel-ratio: 1.3), (max-resolution: 124.8dpi) {
 	@font-face {