of historical military vehicles, aircraft, and ships built in true scale dimensions. Auf Rädern und Ketten (on wheels and chains), is a major gathering of historical military vehicles built until 1969, which takes place each year around the beginning of June. More than 100 vehicles from various branches of the military - from tanks to bicycles - are presented to the public in the outdoor area behind the museum building. Montur und Pulverdampf (Uniform and Gunpowder) a three-day festival of time-travel in military history from the Middle Ages to the present, which takes place each year between early and mid-July. The large outdoor area behind the museum serves as a stage for story tellers, historical battle re-enactments, craftsmen, traders, musicians, culinary delights, and a comprehensive children's programme. Mittelalterlicher Adventmarkt (Medieval Christmas market), is usually organised on a weekend in early December and draws up to 20,000 visitors. It involves a medieval Christmas market with jugglers, musicians, fencing performances, and trader's tents. Apart from these large events, the museum regularly hosts fencing performances by the Rittersporn and Klingenspiel groups, as well as drill performances and gun salutes by the 2nd horse artillery division. Particular highlights during the year include the Long Night of Museums organised by the Austrian Broadcasting Corporation ORF, and events accompanying the Austrian National Day on 26 October. Information The museum is open daily from 9 am to 5 pm (except on New Year's Day, Easter Sunday, 1 May, All Saints' Day, and on 25 and 31 Decembe)r. Admission is free of charge on the first Sunday of each month and on Austrian National Day (26 October). Each Sunday and holiday, museum employees offer guided tours on special historical eras and areas. Of great importance is the work of the museum's educational team, which offers a diversified children's and school programme for the different grades. Moreover, it is possible to organize children's birthday parties and other special events. Special exhibitions As a rule, the Heeresgeschichtliches Museum hosts a special exhibition twice a year on a military history theme. Past and present exhibitions include: Seelen der gewesenen Zeit - Historische Schätze der Bibliothek (Souls of past time - historical treasures of the library, 3 December 2013 to 31 August 2014) Dröhnende Motoren (Roaring engines, 7 September to 20 October 2013), Zeltweg Air Base Fliegen im Ersten Weltkrieg (Flying in World War I, 26 April to 20 October 2013), Zeltweg