1: πύργος
(Strong's #4444 — Noun Masculine — purgos — poor'-gos )

is used of "a watchtower in a vineyard," Matthew 21:33; Mark 12:1; probably, too, in Luke 14:28 (cp. Isaiah 5:2 ); in Luke 13:4 , of the "tower in Siloam," the modern Silwan, which is built on a steep escarpment of rock.