diff --git a/src/XML/fed/Realm.php b/src/XML/fed/Realm.php
new file mode 100644
index 00000000..4e6e93c1
--- /dev/null
+++ b/src/XML/fed/Realm.php
@@ -0,0 +1,44 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\WSSecurity\XML\fed;
+
+use DOMElement;
+use SimpleSAML\Assert\Assert;
+use SimpleSAML\XML\Exception\InvalidDOMElementException;
+use SimpleSAML\XML\StringElementTrait;
+
+use function sprintf;
+
+/**
+ * A Realm element
+ *
+ * @package tvdijen/ws-security
+ */
+final class Realm extends AbstractFedElement
+{
+    use StringElementTrait;
+
+
+    /**
+     * @param string $content
+     */
+    public function __construct(string $content)
+    {
+        $this->setContent($content);
+    }
+
+
+    /**
+     * Validate the content of the element.
+     *
+     * @param string $content  The value to go in the XML textContent
+     * @throws \SimpleSAML\XML\Exception\SchemaViolationException on failure
+     * @return void
+     */
+    protected function validateContent(string $content): void
+    {
+        Assert::validURI($content, SchemaViolationException::class);
+    }
+}
diff --git a/src/XML/sp/IssuerName.php b/src/XML/sp/IssuerName.php
index da22541f..1172d9dc 100644
--- a/src/XML/sp/IssuerName.php
+++ b/src/XML/sp/IssuerName.php
@@ -5,6 +5,7 @@
 namespace SimpleSAML\WSSecurity\XML\sp;
 
 use SimpleSAML\Assert\Assert;
+use SimpleSAML\XML\Exception\SchemaViolationException;
 use SimpleSAML\XML\StringElementTrait;
 
 /**
@@ -38,6 +39,6 @@ public function __construct(
      */
     protected function validateContent(string $content): void
     {
-        Assert::validURI($content);
+        Assert::validURI($content, SchemaViolationException::class);
     }
 }
diff --git a/tests/WSSecurity/XML/fed/RealmTest.php b/tests/WSSecurity/XML/fed/RealmTest.php
new file mode 100644
index 00000000..7bc7a186
--- /dev/null
+++ b/tests/WSSecurity/XML/fed/RealmTest.php
@@ -0,0 +1,59 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\Test\WSSecurity\XML\sp;
+
+use PHPUnit\Framework\TestCase;
+use SimpleSAML\Test\WSSecurity\Constants as C;
+use SimpleSAML\WSSecurity\XML\fed\Realm;
+use SimpleSAML\XML\DOMDocumentFactory;
+use SimpleSAML\XML\TestUtils\SchemaValidationTestTrait;
+use SimpleSAML\XML\TestUtils\SerializableElementTestTrait;
+
+use function dirname;
+
+/**
+ * Class \SimpleSAML\WSSecurity\XML\fed\RealmTest
+ *
+ * @covers \SimpleSAML\WSSecurity\XML\fed\Realm
+ * @covers \SimpleSAML\WSSecurity\XML\fed\AbstractFedElement
+ *
+ * @package tvdijen/ws-security
+ */
+final class RealmTest extends TestCase
+{
+    use SchemaValidationTestTrait;
+    use SerializableElementTestTrait;
+
+
+    /**
+     */
+    public static function setUpBeforeClass(): void
+    {
+        self::$schemaFile = dirname(__FILE__, 5) . '/resources/schemas/ws-federation.xsd';
+
+        self::$testedClass = Realm::class;
+
+        self::$xmlRepresentation = DOMDocumentFactory::fromFile(
+            dirname(__FILE__, 4) . '/resources/xml/fed_Realm.xml',
+        );
+    }
+
+
+    // test marshalling
+
+
+    /**
+     * Test creating a Realm object from scratch.
+     */
+    public function testMarshalling(): void
+    {
+        $realm = new Realm(C::NAMESPACE);
+
+        $this->assertEquals(
+            self::$xmlRepresentation->saveXML(self::$xmlRepresentation->documentElement),
+            strval($realm),
+        );
+    }
+}
diff --git a/tests/resources/xml/fed_Realm.xml b/tests/resources/xml/fed_Realm.xml
new file mode 100644
index 00000000..b065de94
--- /dev/null
+++ b/tests/resources/xml/fed_Realm.xml
@@ -0,0 +1 @@
+<fed:Realm xmlns:fed="http://docs.oasis-open.org/wsfed/federation/200706">urn:x-simplesamlphp:namespace</fed:Realm>