Maqām Studio Sunday, April 26, 3PM An evening of tarab: Homage to Umm Kalthum A musical tribute to Umm Kalthum's classical masterpieces, “Ruba῾iyyat al-Khayyam,” based on the 13th-century quatrains of the Persian poet Omar Khayyam, and “Hakam ῾Alayna al-Hawa,” the final song she performed in 1973.