In Hallein, the old Orphanage is now the house of the Keltenmuseum; the reconstructed Celtic farmhouse includes edifices and tools and utensils used by the Celts, and a burial chamber constructed on the lines of one found in Dürrnberg. It is open only in summer, but group trips can be arranged in advance at other times. The museum displays finds from the Hallstatt and La Tène (Iron Age) periods (800-15 B.C.), taken from the prehistoric crucial found on the Dürrnberg. Documents exemplify the growth of the township and the development of its financial system as a result of its salt resources, and there are exhibits portraying local customs and the history of the township guilds.