Approximately how many people lived in constantinople at its height?

26 Million

Approximately 26 million people lived in Constantinople at its height. The population of the Byzantine Empire was varied throughout its history but is believed to have peaked at 26 million. The population begun to decrease with the arrival of the Turks

danielu suge pula

explanation:

its main object was the establishment of "settlement houses" in poor urban areas, in which volunteer middle-class "settlement workers" would live, hoping to share knowledge and culture with, and alleviate the poverty of, their low-income neighbors.