And next to him repaired Ezer the son of Jeshua, the ruler of Mizpah, another piece over against the going up to the armoury at the turning of the wall. The going up to the armoury - This was either a tower that defended the angle where the two walls met; or the city arsenal, where shields, spears, etc., were kept to arm the people in time of danger.
Related Commentaries of Nehemiah 3:19
Nehemiah 3:19
19 And next to him repaired Ezer the son of Jeshua, the ruler of Mizpah, another piece over against the going up to the armoury at the turning of the wall.