diff -r 7b1b88e27a20 -r 48c4eec2b7e6 wp/wp-includes/blocks/site-tagline.php
--- a/wp/wp-includes/blocks/site-tagline.php	Thu Sep 29 08:06:27 2022 +0200
+++ b/wp/wp-includes/blocks/site-tagline.php	Fri Sep 05 18:40:08 2025 +0200
@@ -8,6 +8,8 @@
 /**
  * Renders the `core/site-tagline` block on the server.
  *
+ * @since 5.8.0
+ *
  * @param array $attributes The block attributes.
  *
  * @return string The render.
@@ -17,11 +19,18 @@
 	if ( ! $site_tagline ) {
 		return;
 	}
+
+	$tag_name           = 'p';
 	$align_class_name   = empty( $attributes['textAlign'] ) ? '' : "has-text-align-{$attributes['textAlign']}";
 	$wrapper_attributes = get_block_wrapper_attributes( array( 'class' => $align_class_name ) );
 
+	if ( isset( $attributes['level'] ) && 0 !== $attributes['level'] ) {
+		$tag_name = 'h' . (int) $attributes['level'];
+	}
+
 	return sprintf(
-		'<p %1$s>%2$s</p>',
+		'<%1$s %2$s>%3$s</%1$s>',
+		$tag_name,
 		$wrapper_attributes,
 		$site_tagline
 	);
@@ -29,6 +38,8 @@
 
 /**
  * Registers the `core/site-tagline` block on the server.
+ *
+ * @since 5.8.0
  */
 function register_block_core_site_tagline() {
 	register_block_type_from_metadata(
@@ -38,4 +49,5 @@
 		)
 	);
 }
+
 add_action( 'init', 'register_block_core_site_tagline' );