In The Horoscope of Emperor Baldwin II Filip Van Tricht presents a microstudy of political, social and cultural life in Latin-Byzantine Constantinople and Romania. A 'new' set of sources is used to question the traditionally negative view of the Byzantine capital under Latin rule. Combined with an analysis of other underused historical materials, mid-13th century Latin-Byzantine Constantinople is redefined as a city that-in spite of the Western conquest during the Fourth Crusade-remained dynamic, with vibrant internal and international politics, and with interesting developments in the social, religious, artistic, and scientific spheres. Against the background of a shared Roman past the metropolis on the Bosporus became a fascinating laboratory of Latin-Byzantine interaction.