Slave market
In the Ottoman Empire during the mid-14th century, slaves were traded in special marketplaces called "Esir" or "Yesir". These could be found in most cities.  It is said that Sultan Mehmed II "the Conqueror" established the first Ottoman slave market in Constantinople in the 1460s, probably where the former Byzantine slave market had stood. According to Nicolas de Nicolay, there were slaves of all ages, and both sexes; the wew displayed naked, so that possible buyers could check them thououghly.