Eyüp Sultan Mosque in Istanbul holds the tomb of Abu Ayyub al-Ansari, a companion of the Prophet Muhammad. It is smaller than the large mosques, but its layout is dense and its details are finely finished, and it is striking when seen together with its fountain. Weekday mornings around 9 a.m. are relatively quiet, while weekends, Fridays and holidays are crowded, and visitors need to bring a skirt and a headscarf. The cable car wait on Sundays can exceed 30 minutes.