Tower with ramp or external staircase

[Koen G]

I suspect the "Jerusalem with ramp" might derive from something like this:


"City of Jerusalem, to the left of the stairs is King David, to right the queen - the personification of Zion. Doeg the Edomite, telling King Saul about David. Psalms 50-51, Chludov Psalter, Byzantine, 9th century, Moscow, Historical Museum MS 129"