Toyserkan (Persian: تویسرکان) is a city located about 100 km south of Hamadan, at west of Iran. However, it was formerly called Roud Avar. Latter was ruined in the invasion of the Mongols and its people fled to Toy (or Tuy) village, afterwards called Toyserkan because of its proximity to Serkan (a town located in northwest of Toyserkan). The ancient hills of Baba Kamal, Roudlar, Shahrestaneh, the remains of a Sassanid city in Velashjerd, the Saljuk Dome named after prophet Habakkuk, the Safavid building of Shaykh Ali Khani School and the Qajar period’s covered bazaar, are all indicative of Toyserkan’s historical background.