Take a tour of Petersberg Citadel in Erfurt, Germany – part of the World’s Greatest Attractions travel video series by GeoBeats. Erfurt, in the center of Germany is a showpiece of medieval architecture and ancient Germanic history. A baroque style fortress, built in the seventeenth century, the Petersberg Citadel displays elements of ornate European architecture. The foundation of the building consists of labyrinthine mazes and passages, which visitors can traverse with a guide. The citadel is the only preserved fortress in Erfurt which attests to the rule of the Mainz electors during the time of the Holy Roman Empire. The roof of the citadel houses a restaurant and cafe which overlooks Erfurt's Cathedral Square. Recent renovations have restored Petersberg Citadel to like-new condition, which meansit is now fully accessible to visitors.