The graveyard in which many sahabas (May Allah be pleased with them all), like Hadrat Bilal al Habashi RA is burried. The graveyard is also known as "Goristan-e-Ghariban".
H. Bilal (ra) used to be a slave and were among the first Muslims. He suffered alot as his master was not a Muslim and he didn't like the conversion. He was bought free by H. Abu Bakr (ra). H.Bilal was the first Muezzin.