diff --git a/data/xml/traditions.xml b/data/xml/traditions.xml
index 1ef1e9f..683aa43 100644
--- a/data/xml/traditions.xml
+++ b/data/xml/traditions.xml
@@ -83,6 +83,11 @@
 			</app>
 		</letterTradition>
 		
+		<letterTradition letter="13">
+			<app ref="4">
+				Kraków, Biblioteka Jagiellońska, Lenziana 5, Nr. 9
+			</app>
+		</letterTradition>