Ever since Thomas's Historia Salonitana was first published in 1666, it became a part of the corpus of European medieval literature. Thomas' aim was to write a history of the church of Split in order to prove that it was legally and justly the heir of the metropolitan rights of nearby Salona, an episcopal see from the 4th century. His reports on the fourth and the fifth crusade and on the Mongol invasion of 1241-2, are based on personal experience or on eyewitness reports. This is the 4th volume of the series of Central European Medieval Texts, Latin and English bilingual editions of major historical documents.