τὸ ἐγδοχῖον τοῦ ὕδατος καὶ τὰ ἐν τῆι πόλει ὑδραγώγια → the water reservoir and the conduits in the city (or on the acropolis)
tower: P. and V. πύργος, ὁ.
top: P. and V. κορυφή, ἡ.
Met., extreme point: P. and V. ἀκμή, ἡ, ἄκρον, τό.