The Borj Neffara (Arabic: برج النفارة , "Tower of the Trumpeters") is a historic observation tower and landmark near the Qarawiyyin Mosque in Fes el-Bali, the old city of Fes, Morocco.

[1][2] The construction of the tower is attributed to the Marinid sultan Abu Inan in the mid-14th century.

[2] The tower is part of a slightly larger structure called the Dar al-Muwaqqit ("House of the Timekeeper"), a term also used for the room or residence of the timekeeper (muwaqqit) in various mosques.

[2][3] Many mosques already had a muwaqqit who was responsible for establishing the times of prayers and other time-related functions.

This tower was meant to assist in determining the accurate beginning of the months (including Ramadan) in the Islamic lunar calendar, something for which astronomical observation was crucial.