Descripción del sitio
Shrine for Mashhad of Imam Yahya ibn al-Qasim. Built in 1229 A.D. by Badr al-Din Lu'lu', then ruler of Mosul. The Mausoleum is located on the Tigris riverbank. The mihrab is situated at the southwest corner of the tomb because the building is not oriented towards Mecca.
Note: I wasn't able to find out any info about Imam Yahya ibn al-Qasim himself, just about the shrine.