Great Mosque of Sana'a is an ancient mosque in Sana'a, Yemen, just east of the old Ghumdan Palace site. Dating to the seventh century, it was reportedly built in part from the materials of the Ghumdan palace.
Local legend traces the mosque's history to the period of Muhammad. The building has undergone several renovations in later centuries. An important archaeological find was the Sana'a manuscript, discovered there during restoration in 1972. The Sana'a manuscript contains some early verses of the Quran that differ slightly from nowaday's standard version of the Quran.