During the Byzantine period, the tower, and by extension the Citadel as a whole, acquired its alternative name - the Tower of David - after the Byzantines, mistakenly identifying the hill as Mount Zion, presumed it to be David's palace. This name is still in use today, although in the 19th century an Ottoman minaret erected between 1635-65 over the southern wall of the Citadel took over the title of Tower of David, so that the name can now refer to either the whole Citadel or the minaret alone.