He was born in Gjirokastër, Ottoman Empire (today's Albania). Vasileiou was one of many Greek merchants in the 18th-19th centuries that were involved in the fields of education and literature. A. Vasileiou played an essential role in the Greek Enlightenment movement. His contact with Adamantios Korais, a major figure of Greek literature at that time, was of unique importance for him, while he lived in Paris.
Correspondence between the two men was continuous. A. Vasileiou adopted the ideas of Korais to the Greek language question and confronted the conservative scholar Neofitos Doukas. He was the author of a number of articles in the Hermes o Logios magazine (a Greek literary magazine, published in Vienna). At the same time he supported financially the publication of several issues of Logios Ermis and other literature material.