So far as it has been uncovered by French archaeologists--sufficiently for our purpose, though not completely--the 'colonia' of Trajan appears to have been some 29 or 30 acres in extent within the walls and almost square in outline (360 x 390 yds.).

It was entered by four principal gates, three of which can still be traced quite clearly, and which stood in the middle of their respective sides; the position of the south gate is doubtful.
According to Dr.Barthel, the street which joins the east and west gates was laid out to point to the sunrise of September 18, the birthday of Trajan.
[Illustration: FIG.23.SIX 'INSULAE' IN S.W.

TIMGAD (after Prof.Cagnat).

Nos.

91, 92, 99, one house each; 108, 109, 3 houses; 100, Baths.] The interior of the town was divided by streets into a chess-board pattern of small square house-blocks; from north to south there were twelve such blocks and from east to west eleven--not twelve, as is often stated.