After them the Tekoites repaired another piece, over against the great tower that lieth out, even unto the wall of Ophel.

Scofield Reference Notes

Margin Ophel

Trans. "tower," 2Ki 5:24 2Chr 27:3 33:14. Perhaps part of the fort called Millo, 1Ki 9:15 2Chr 32:5.Nehemiah 3:27 Parallel Commentaries

Some Buildings in Acra. Bezeiha. Millo.
Mount Sion did not thrust itself so far eastward as mount Acra: and hence it is, that mount Moriah is said, by Josephus, to be "situate over-against Acra," rather than over-against the Upper City: for, describing Acra thus, which we produced before, "There is another hill, called Acra, which bears the Lower City upon it, steep on both sides": in the next words he subjoins this, "Over-against this was a third hill," speaking of Moriah. The same author thus describes the burning of the Lower City: …
John Lightfoot—From the Talmud and Hebraica

The Girdle of the City. Nehemiah 3
The beginning of the circumference was from 'the sheep-gate.' That, we suppose, was seated on the south part, yet but little removed from that corner, which looks south-east. Within was the pool of Bethesda, famous for healings. Going forward, on the south part, was the tower Meah: and beyond that, "the tower of Hananeel": in the Chaldee paraphrast it is, 'The tower Piccus,' Zechariah 14:10; Piccus, Jeremiah 31:38.--I should suspect that to be, the Hippic tower, were not that placed on the north …
John Lightfoot—From the Talmud and Hebraica