diff --git a/src/XML/fed/SecurityTokenServiceType.php b/src/XML/fed/SecurityTokenServiceType.php
new file mode 100644
index 00000000..0841fc1b
--- /dev/null
+++ b/src/XML/fed/SecurityTokenServiceType.php
@@ -0,0 +1,158 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\WSSecurity\XML\fed;
+
+use DateTimeImmutable;
+use DOMElement;
+use SimpleSAML\Assert\Assert;
+use SimpleSAML\SAML2\Assert\Assert as SAMLAssert;
+use SimpleSAML\SAML2\XML\md\{ContactPerson, Extensions, KeyDescriptor, Organization};
+use SimpleSAML\XML\Exception\InvalidDOMElementException;
+use SimpleSAML\XML\Exception\TooManyElementsException;
+use SimpleSAML\XMLSecurity\XML\ds\Signature;
+
+use function preg_split;
+
+/**
+ * Class representing WS-federation SecurityTokenServiceType RoleDescriptor.
+ *
+ * @package simplesamlphp/ws-security
+ */
+final class SecurityTokenServiceType extends AbstractSecurityTokenServiceType
+{
+    /**
+     * Convert XML into a SecurityTokenServiceType RoleDescriptor
+     *
+     * @param \DOMElement $xml The XML element we should load
+     * @return static
+     *
+     * @throws \SimpleSAML\XML\Exception\InvalidDOMElementException
+     *   if the qualified name of the supplied element is wrong
+     * @throws \SimpleSAML\XML\Exception\TooManyElementsException
+     *   if too many child-elements of a type are specified
+     */
+    public static function fromXML(DOMElement $xml): static
+    {
+        Assert::same($xml->localName, 'RoleDescriptor', InvalidDOMElementException::class);
+        Assert::same($xml->namespaceURI, static::NS, InvalidDOMElementException::class);
+
+        $protocols = self::getAttribute($xml, 'protocolSupportEnumeration');
+        $validUntil = self::getOptionalAttribute($xml, 'validUntil', null);
+        SAMLAssert::nullOrValidDateTime($validUntil);
+
+        $orgs = Organization::getChildrenOfClass($xml);
+        Assert::maxCount(
+            $orgs,
+            1,
+            'More than one Organization found in this descriptor',
+            TooManyElementsException::class,
+        );
+
+        $extensions = Extensions::getChildrenOfClass($xml);
+        Assert::maxCount(
+            $extensions,
+            1,
+            'Only one md:Extensions element is allowed.',
+            TooManyElementsException::class,
+        );
+
+        $logicalServiceNamesOffered = LogicalServiceNamesOffered::getChildrenOfClass($xml);
+        Assert::maxCount(
+            $logicalServiceNamesOffered,
+            1,
+            'Only one fed:LogicalServiceNamesOffered is allowed.',
+            TooManyElementsException::class,
+        );
+
+        $tokenTypesOffered = TokenTypesOffered::getChildrenOfClass($xml);
+        Assert::maxCount(
+            $tokenTypesOffered,
+            1,
+            'Only one fed:TokenTypesOffered is allowed.',
+            TooManyElementsException::class,
+        );
+
+        $claimDialectsOffered = ClaimDialectsOffered::getChildrenOfClass($xml);
+        Assert::maxCount(
+            $claimDialectsOffered,
+            1,
+            'Only one fed:ClaimDialectsOffered is allowed.',
+            TooManyElementsException::class,
+        );
+
+        $claimTypesOffered = ClaimTypesOffered::getChildrenOfClass($xml);
+        Assert::maxCount(
+            $claimTypesOffered,
+            1,
+            'Only one fed:ClaimTypesOffered is allowed.',
+            TooManyElementsException::class,
+        );
+
+        $claimTypesRequested = ClaimTypesRequested::getChildrenOfClass($xml);
+        Assert::maxCount(
+            $claimTypesRequested,
+            1,
+            'Only one fed:ClaimTypesRequested is allowed.',
+            TooManyElementsException::class,
+        );
+
+        $automaticPseudonyms = AutomaticPseudonyms::getChildrenOfClass($xml);
+        Assert::maxCount(
+            $automaticPseudonyms,
+            1,
+            'Only one fed:AutomaticPseudonyms is allowed.',
+            TooManyElementsException::class,
+        );
+
+        $targetScopes = TargetScopes::getChildrenOfClass($xml);
+        Assert::maxCount(
+            $targetScopes,
+            1,
+            'Only one fed:TargetScopes is allowed.',
+            TooManyElementsException::class,
+        );
+
+        $signature = Signature::getChildrenOfClass($xml);
+        Assert::maxCount(
+            $signature,
+            1,
+            'Only one ds:Signature element is allowed.',
+            TooManyElementsException::class,
+        );
+
+        $securityTokenServiceType = new static(
+            preg_split('/[\s]+/', trim($protocols)),
+            self::getOptionalAttribute($xml, 'ID', null),
+            $validUntil !== null ? new DateTimeImmutable($validUntil) : null,
+            self::getOptionalAttribute($xml, 'cacheDuration', null),
+            array_pop($extensions),
+            self::getOptionalAttribute($xml, 'errorURL', null),
+            KeyDescriptor::getChildrenOfClass($xml),
+            array_pop($orgs),
+            ContactPerson::getChildrenOfClass($xml),
+            self::getAttributesNSFromXML($xml),
+            array_pop($logicalServiceNamesOffered),
+            array_pop($tokenTypesOffered),
+            array_pop($claimDialectsOffered),
+            array_pop($claimTypesOffered),
+            array_pop($claimTypesRequested),
+            array_pop($automaticPseudonyms),
+            array_pop($targetScopes),
+            self::getOptionalAttribute($xml, 'ServiceDisplayName', null),
+            self::getOptionalAttribute($xml, 'ServiceDescription', null),
+            SecurityTokenServiceEndpoint::getChildrenOfClass($xml),
+            SingleSignOutSubscriptionEndpoint::getChildrenOfClass($xml),
+            SingleSignOutNotificationEndpoint::getChildrenOfClass($xml),
+            PassiveRequestorEndpoint::getChildrenOfClass($xml),
+        );
+
+        if (!empty($signature)) {
+            $securityTokenServiceType->setSignature($signature[0]);
+            $securityTokenServiceType->setXML($xml);
+        }
+
+        return $securityTokenServiceType;
+    }
+}