The church at Derè Aghsy,[16] for instance, if we had only the plan to guide us, would appear to be a typical domed basilica (Fig. [2]), but on examining the section we find that the north and south dome arches extend over the galleries to the outer walls and form cross arms (Fig. [3]). The building is, in fact, a domed cross church with no gallery in the western arm. Above the narthex at the west end, and separated from the western cross arm, is a gallery of the type usual in the domed basilica, so that Derè Aghsy may be regarded as a domed cross church with features derived from the domed basilica. S. Sophia at Constantinople, the highest development of the domed basilica, has a very similar western gallery.
Fig. 2.—Deré Aghsy (Rott).
The church of S. Nicholas at Myra [17] (Fig. [4]) has a gallery at the west end, but the cross arms do not appear to be carried over the galleries. The plan is oblong and the cross-groined vault is not used. The church, therefore, takes its place as a domed basilica.
Fig. 3.—Deré Aghsy—Section (Rott).
The church of the Koimesis at Nicaea [18] (Figs. [5] and [6]) has no galleries to the sides. The aisles open into the central area by arcades, above which are triple windows over the aisle vaults. At the western end is a gallery above the narthex. The aisles are barrel-vaulted, and as the church is planned on an axis from east to west, and is not symmetrical on all three sides, it is regarded as a domed basilica. It is such a form as might be developed from a basilica without galleries.