Hamadan

Sultanieh has been one of the places which in Ilkhanid's period came to centrality and till many years after the downfall of Ilkhanids has been influential to its surrounding areas and has been influenced in return as well. One of such nearby areas which grew in light of the centrality and the political and economical importance of Sultanieh was in Dargazin to the west of Sultanieh. The economical and security needs of the capital, and the gaining support of the religious groups and scholars, have been three main factors in paying attention to the surrounding areas.The findings show that the necessity of ensuring the security of the capital and its economical needs, along with the geographical and political location of Dargazin, has played an important role on the interconnection of these two areas and the historical evolution of Dargazin. This study tries to benefit from the historical sources in order to examine the effect of Sultanieh centrality on the situation in Dargazin, and to determine the historical connection between the two cities in the political and social fields, and to explain some changes in this regard. This study is a library and source analysis research and the information is organized and analyzed after being collected.

The vernacular architecture of cities with old civilizations like Hamadan, located in a cold and mountainous area, s tems from centuries of optimizing material use, cons truction techniques, climate considerations, and the leas t use of fossil fuels to provide residents comfort. This region represents a specific type of dwelling that is a spectacular example of its climate conditions and compatible with its surrounding environment. This s tudy aims to inves tigate the geometric conformation of Hamedan houses and elicit the proper sugges tions to provide comfort conditions. To reach these goals, 15 houses located in the old dis tricts of Hamadan belonging to three different his torical eras were selected. Then, according to Mahoney's Table, Evan's index, Pen warden graph, and climate consultant software thermal comfort factors were assessed and calculated to compare elicited design s trategies with typology. These attributes to architectural s trategies for this region like southeas tern orientation, medium-sized windows, thick outdoor and indoor walls, thick insulation with sufficient temporary heating equipment, the high heat capacity of materials, compact urban texture and planning, protection agains t intensive wind aimed to provide comfort conditions. Then these methods were compared whit three eras' houses to illus trate how much compatibility was there practically, which eventually reduced in each of them.