Arab–Byzantine wars: Thessalonica, the Byzantine Empire's second-largest city, was sacked by Saracen raiders. Thessaloniki: Thessaloniki is the capital and largest city of the administrative region of Central Macedonia, and the second-largest city in Greece. It is the largest city of Northern Greece, with over 300,000 in the city proper and slightly over one million inhabitants in its metropolitan area, the capital of the geographic region of Macedonia, and the Decentralized Administration of Macedonia and Thrace. It is also known in Greek as i Symprotévousa, literally "the co-capital", a reference to its historical status as the "co-reigning" city of the Byzantine Empire alongside Constantinople. July 29, 904. Wiki link