The Tomb of Hassan Modarres is a Twelver Shi'ite Islamic mausoleum, located in Kashmar, in the province of Razavi Khorasan, Iran. The mausoleum contains the remains of Sayyid Hassan Modarres, a prominent Shi'ite cleric who formerly served as a cabinet representative of the Islamic Consultative Assembly. He was assassinated in 1937, and the mausoleum was built over his grave in 1943 CE following the forced abdication of Reza Shah Pahlavi.