From above the horse gate repaired the priests
So called, either because near it were stables for horses; or through it horses were led to be watered at the brook of Kidron, to which it was near; or to be exercised in the valley; Josephus F3 speaks of the "hippie", or horse tower, which might be near it:
everyone over against his house;
for it seems there was a row of houses in which the priests dwelt, and each of them repaired as much of the wall as was right against his house.
F3 Ut supra. (De Bello Jud. l. 5. c. 4. sect. 2, 3.)