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 .