diff --git a/src/SAML11/XML/saml/AbstractAttributeStatementType.php b/src/SAML11/XML/saml/AbstractAttributeStatementType.php
new file mode 100644
index 0000000..0987bcf
--- /dev/null
+++ b/src/SAML11/XML/saml/AbstractAttributeStatementType.php
@@ -0,0 +1,92 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\SAML11\XML\saml;
+
+use DateTimeImmutable;
+use DOMElement;
+use SimpleSAML\Assert\Assert;
+use SimpleSAML\SAML11\Constants as C;
+use SimpleSAML\SAML11\Exception\ProtocolViolationException;
+use SimpleSAML\XML\Exception\InvalidDOMElementException;
+use SimpleSAML\XML\Exception\MissingElementException;
+use SimpleSAML\XML\Exception\SchemaViolationException;
+use SimpleSAML\XML\Exception\TooManyElementsException;
+
+/**
+ *  SAML AttributeStatementType abstract data type.
+ *
+ * @package simplesamlphp/saml11
+ */
+abstract class AbstractAttributeStatementType extends AbstractSubjectStatementType
+{
+    /**
+     * Initialize a saml:AttributeStatementType from scratch
+     *
+     * @param \SimpleSAML\SAML11\XML\saml\Subject $subject
+     * @param array<\SimpleSAML\SAML11\XML\saml\Attribute> $attribute
+     */
+    public function __construct(
+        Subject $subject,
+        protected array $attribute = [],
+    ) {
+        Assert::allIsInstanceOf($attribute, Attribute::class, SchemaViolationException::class);
+
+        parent::__construct($subject);
+    }
+
+
+    /**
+     * Collect the value of the attribute-property
+     *
+     * @return array<\SimpleSAML\SAML11\XML\saml\Attribute>
+     */
+    public function getAttributes(): array
+    {
+        return $this->attribute;
+    }
+
+
+    /**
+     * Convert XML into an AttributeStatementType
+     *
+     * @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
+     */
+    public static function fromXML(DOMElement $xml): static
+    {
+        Assert::same($xml->localName, static::getLocalName(), InvalidDOMElementException::class);
+        Assert::same($xml->namespaceURI, static::NS, InvalidDOMElementException::class);
+
+        $subject = Subject::getChildrenOfClass($xml);
+        Assert::minCount($subject, 1, MissingElementException::class);
+        Assert::maxCount($subject, 1, TooManyElementsException::class);
+
+        return new static(
+            array_pop($subject),
+            Attribute::getChildrenOfClass($xml),
+        );
+    }
+
+
+    /**
+     * Convert this AttributeStatementType to XML.
+     *
+     * @param \DOMElement $parent The element we are converting to XML.
+     * @return \DOMElement The XML element after adding the data corresponding to this AttributeStatementType.
+     */
+    public function toXML(DOMElement $parent = null): DOMElement
+    {
+        $e = parent::toXML($parent);
+
+        foreach ($this->getAttributes() as $attr) {
+            $attr->toXML($e);
+        }
+
+        return $e;
+    }
+}
diff --git a/src/SAML11/XML/saml/AttributeStatement.php b/src/SAML11/XML/saml/AttributeStatement.php
new file mode 100644
index 0000000..928f4ff
--- /dev/null
+++ b/src/SAML11/XML/saml/AttributeStatement.php
@@ -0,0 +1,14 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\SAML11\XML\saml;
+
+/**
+ * Class representing a saml:AttributeStatement element.
+ *
+ * @package simplesamlphp/saml11
+ */
+final class AttributeStatement extends AbstractAttributeStatementType
+{
+}
diff --git a/tests/resources/xml/saml_AttributeStatement.xml b/tests/resources/xml/saml_AttributeStatement.xml
new file mode 100644
index 0000000..6c8bece
--- /dev/null
+++ b/tests/resources/xml/saml_AttributeStatement.xml
@@ -0,0 +1,22 @@
+<saml:AttributeStatement xmlns:saml="urn:oasis:names:tc:SAML:1.0:assertion">
+  <saml:Subject>
+    <saml:NameIdentifier NameQualifier="TheNameQualifier" Format="urn:the:format">TheNameIDValue</saml:NameIdentifier>
+    <saml:SubjectConfirmation>
+      <saml:ConfirmationMethod>_Test1</saml:ConfirmationMethod>
+      <saml:ConfirmationMethod>_Test2</saml:ConfirmationMethod>
+      <saml:SubjectConfirmationData xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xs="http://www.w3.org/2001/XMLSchema" xsi:type="xs:integer">2</saml:SubjectConfirmationData>
+      <ds:KeyInfo xmlns:ds="http://www.w3.org/2000/09/xmldsig#" Id="fed654">
+        <ds:KeyName>testkey</ds:KeyName>
+        <ds:X509Data>
+          <ds:X509Certificate>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</ds:X509Certificate>
+          <ds:X509SubjectName>/CN=selfsigned.simplesamlphp.org/O=SimpleSAMLphp HQ/L=Honolulu/ST=Hawaii/C=US</ds:X509SubjectName>
+        </ds:X509Data>
+        <ssp:Chunk xmlns:ssp="urn:x-simplesamlphp:namespace">some</ssp:Chunk>
+      </ds:KeyInfo>
+    </saml:SubjectConfirmation>
+  </saml:Subject>
+  <saml:Attribute xmlns:saml="urn:oasis:names:tc:SAML:1.0:assertion" AttributeName="TheName" AttributeNamespace="https://example.org/">
+    <saml:AttributeValue>FirstValue</saml:AttributeValue>
+    <saml:AttributeValue>SecondValue</saml:AttributeValue>
+  </saml:Attribute>
+</saml:AttributeStatement>
diff --git a/tests/src/SAML11/XML/saml/AttributeStatementTest.php b/tests/src/SAML11/XML/saml/AttributeStatementTest.php
new file mode 100644
index 0000000..6795d97
--- /dev/null
+++ b/tests/src/SAML11/XML/saml/AttributeStatementTest.php
@@ -0,0 +1,174 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\Test\SAML11\XML\saml;
+
+use DateTimeImmutable;
+use PHPUnit\Framework\TestCase;
+use SimpleSAML\SAML11\Constants as C;
+use SimpleSAML\SAML11\Utils\XPath;
+use SimpleSAML\SAML11\XML\saml\Attribute;
+use SimpleSAML\SAML11\XML\saml\AttributeValue;
+use SimpleSAML\SAML11\XML\saml\AttributeStatement;
+use SimpleSAML\SAML11\XML\saml\ConfirmationMethod;
+use SimpleSAML\SAML11\XML\saml\NameIdentifier;
+use SimpleSAML\SAML11\XML\saml\Subject;
+use SimpleSAML\SAML11\XML\saml\SubjectConfirmation;
+use SimpleSAML\SAML11\XML\saml\SubjectConfirmationData;
+use SimpleSAML\XML\Chunk;
+use SimpleSAML\XML\DOMDocumentFactory;
+use SimpleSAML\XML\TestUtils\SchemaValidationTestTrait;
+use SimpleSAML\XML\TestUtils\SerializableElementTestTrait;
+use SimpleSAML\XMLSecurity\TestUtils\PEMCertificatesMock;
+use SimpleSAML\XMLSecurity\XML\ds\KeyInfo;
+use SimpleSAML\XMLSecurity\XML\ds\KeyName;
+use SimpleSAML\XMLSecurity\XML\ds\X509Certificate;
+use SimpleSAML\XMLSecurity\XML\ds\X509Data;
+use SimpleSAML\XMLSecurity\XML\ds\X509SubjectName;
+
+use function dirname;
+use function strval;
+
+/**
+ * Tests for AttributeStatement elements.
+ *
+ * @covers \SimpleSAML\SAML11\XML\saml\AttributeStatement
+ * @covers \SimpleSAML\SAML11\XML\saml\AbstractAttributeStatementType
+ * @covers \SimpleSAML\SAML11\XML\saml\AbstractSamlElement
+ *
+ * @package simplesamlphp/saml11
+ */
+final class AttributeStatementTest extends TestCase
+{
+    use SchemaValidationTestTrait;
+    use SerializableElementTestTrait;
+
+    /** @var string */
+    private static string $certificate;
+
+    /** @var string[] */
+    private static array $certData;
+
+
+    /**
+     */
+    public static function setUpBeforeClass(): void
+    {
+        self::$schemaFile = dirname(__FILE__, 6) . '/resources/schemas/oasis-sstc-saml-schema-assertion-1.1.xsd';
+
+        self::$testedClass = AttributeStatement::class;
+
+        self::$xmlRepresentation = DOMDocumentFactory::fromFile(
+            dirname(__FILE__, 5) . '/resources/xml/saml_AttributeStatement.xml',
+        );
+
+        self::$certificate = str_replace(
+            [
+                '-----BEGIN CERTIFICATE-----',
+                '-----END CERTIFICATE-----',
+                '-----BEGIN RSA PUBLIC KEY-----',
+                '-----END RSA PUBLIC KEY-----',
+                "\r\n",
+                "\n",
+            ],
+            [
+                '',
+                '',
+                '',
+                '',
+                "\n",
+                ''
+            ],
+            PEMCertificatesMock::getPlainCertificate(PEMCertificatesMock::SELFSIGNED_CERTIFICATE),
+        );
+
+        self::$certData = openssl_x509_parse(
+            PEMCertificatesMock::getPlainCertificate(PEMCertificatesMock::SELFSIGNED_CERTIFICATE),
+        );
+    }
+
+
+    // marshalling
+
+
+    /**
+     * Test creating an AttributeStatement from scratch
+     */
+    public function testMarshalling(): void
+    {
+        $scd = new SubjectConfirmationData(2);
+
+        $keyInfo = new KeyInfo(
+            [
+                new KeyName('testkey'),
+                new X509Data(
+                    [
+                        new X509Certificate(self::$certificate),
+                        new X509SubjectName(self::$certData['name']),
+                    ],
+                ),
+                new Chunk(DOMDocumentFactory::fromString(
+                    '<ssp:Chunk xmlns:ssp="urn:x-simplesamlphp:namespace">some</ssp:Chunk>'
+                )->documentElement),
+            ],
+            'fed654',
+        );
+
+        $sc = new SubjectConfirmation(
+            [new ConfirmationMethod('_Test1'), new ConfirmationMethod('_Test2')],
+            $scd,
+            $keyInfo,
+        );
+
+        $nameIdentifier = new NameIdentifier(
+            'TheNameIDValue',
+            'TheNameQualifier',
+            'urn:the:format',
+        );
+
+        $subject = new Subject($sc, $nameIdentifier);
+
+        $attribute = new Attribute(
+            'TheName',
+            'https://example.org/',
+            [new AttributeValue('FirstValue'), new AttributeValue('SecondValue')]
+        );
+
+        $attributeStatement = new AttributeStatement(
+            $subject,
+            [$attribute],
+        );
+
+        $this->assertEquals(
+            self::$xmlRepresentation->saveXML(self::$xmlRepresentation->documentElement),
+            strval($attributeStatement),
+        );
+    }
+
+
+    public function testMarshallingElementOrdering(): void
+    {
+        $attributeStatement = AttributeStatement::fromXML(self::$xmlRepresentation->documentElement);
+        $attributeStatementElement = $attributeStatement->toXML();
+
+        // Test for a Subject
+        $xpCache = XPath::getXPath($attributeStatementElement);
+        $attributeStatementElements = XPath::xpQuery(
+            $attributeStatementElement,
+            './saml_assertion:Subject',
+            $xpCache,
+        );
+        $this->assertCount(1, $attributeStatementElements);
+
+        // Test ordering of AttributeStatement contents
+        /** @psalm-var \DOMElement[] $authnStatementElements */
+        $attributeStatementElements = XPath::xpQuery(
+            $attributeStatementElement,
+            './saml_assertion:Subject/following-sibling::*',
+            $xpCache,
+        );
+        $this->assertCount(1, $attributeStatementElements);
+        $this->assertEquals('saml:Attribute', $attributeStatementElements[0]->tagName);
+    }
+}