Complex sentence: The oldest written documents in the country, as well as some of the most important work of medieval Montenegrin literature and history can be found here as the town was the seat of the oldest religious institution of Montenegro, the Bar archbishopric.
Split into simpler sentences: The oldest written documents and the most important work of medieval Montenegrin literature and history can be found here. The town was the seat of the oldest religious institution of Montenegro, the Bar archbishopric.