The project Mare Balticum aims to present the medieval musical heritage of the Baltic Sea region in the 12th-15th centuries. It consists of four musical programmes, prepared in great detail, and employing the newest musicological, philological, historical and organological research. Each of these programmes presents the local character of a different coastal region of Balticum, it's specific historical and cultural situation, it's most important saints and rulers, and the Christian roots of the relevant country. They provide an insight into the local literature and musical repertories of medieval Denmark, Sweden, Finland, Germany, and Poland; both Latin and the vernacular are represented, as well as the diversity of historical musical instruments used in those regions at the time. The project as a whole, however, aims to show something of the strong political and cultural connections between those medieval countries, their development over time, and the similarities between them, all of which are essential to our understanding of the common identity and history of Balticum, as is reflected to us through it's centuries of music. (Agnieszka Budzinska-Bennett) As special guest we welcome Benjamin Bagby.