Original: The most important landmarks include: Ehrenburg, a former Franciscan convent built in 1220 and turned into a castle in 1543 - 1549, and renovated until the 19th century.
Simplified: The most important landmarks include: Ehrenburg, a former Franciscan convent built in 1220 and turned into a castle in 1543-1549, and renovated until the 19th century.