The most common for heating is the floor- level fire, the tonir The rooms all have niches of various sizes that were usedas cupboards for holding all kinds of objects
These houses probably belonged to the families of those who worked for Ani`s underground urban service. There must have been some 2000 inhabitants plus people on a temporary stay and those following the caravans. The dovecotes too were in the service of the city. Sixteen of them were found in all and some are circular and crowned with a dome, with openings cut into the living rock and along the whole surface of the cavity. They may have been used for collecting guano, as were the dovecote-compost-heaps of the Iranian oases. This custom is extremely ancient and was used in Egypt, Mesopotamia and Cappadocia Nevertheless, it should also be borne in mind that, if postal services were organized in the Middle Ages for state purposes, in the large trading and artisan centres, such as Ani, the service was available also for private citizens and this was also the case of European countries in the same period.The pigeons were also used, therefore, to carry messages, and so the dovecotes were used as real and proper post offices. The important traders of Ani, such as Tigran Honents, Umek’, Avetents Sahmadin, Uk’an K’arimadin and Papk’an Fahradin, probably had one or more dovecotes serving the short-distance caravans operating for them., Ani was indeed also transit centre for trading: the trade routes from Azerbaidjian and Albania crossed Armenia before reaching Asia Minor and Syria. One of these roads, to the north, connected Nakhidjevan, Dvin, Ani, Karin and Artzn.