Its base is Roman, of mingled stone and brick work.
The mud houses in rear of the bazaars are for the most part uninhabited and in ruins, and even the burnt brick buildings are becoming everywhere dilapidated.
Rice-mills, saw-mills and a few distilleries of locally consumed liquor, one or two brick and tile factories, and here and there a shed in which coarse pottery is made, are all Siam has in the way of factories.
Mr Hogarth explored part of an immense brick structure under the mound of Kom ed-Dik, which may have been part of the Paneum, the Mausolea or a Roman fortress.
Noteworthy public buildings are St Aidan's College, a large brick building in Tudor style, for the use of Anglican students in theology; the market hall (1845); town hall, a free library with branches, borough hospital, built at the cost of Sir John Laird; and many schools both public and private, including the industrial schools built as a memorial to Albert, prince consort, at the cost of Sir W.
Good clays for the manufacture of tile and brick are found at numerous places.
In these thoroughfares and in several of the streets which intersect them are the offices of the mining companies, the banks, clubs, newspaper offices, hotels and shops, the majority being handsome stone or brick buildings, while the survival of some wooden shanties and corrugated iron buildings recalls the early character of the town.
Sepolcro, a circular church with ornamentation in brick and an imitation of opus reticulatum, should probably be attributed to the 6th or 7th centuries.
It is built of brick cased in marble from the quarries which Gian Galeazzo Visconti gave in perpetuity to the cathedral chapter.
On the Constantins platz stands the magnificent brick basilica, probably of the age of Constantine, though the south and east walls are modern.