Wangerooge is one of the East Frisian Islands. It is the easternmost and smallest of the inhabited islands in this group (according to some other measurements, Baltrum is the smallest) and the only one that belonged to the historical district of Oldenburg between 1815 and 1947, whereas other islands always belonged to the county of Ostfriesland. As of the census of 2004, the island has 1,055 inhabitants. Especially in summer the island accommodates more than 7,000 visitors a day.The island is attractive to tourists due to the beaches, various recreation facilities and its relaxed atmosphere. As for historical sites and other places of interest, the island has one active lighthouse, one old lighthouse, and the Western Tower. The Old Lighthouse of Wangerooge also houses the island museum, where the history of Wangerooge is presented.Since the whole island used to be shifting constantly eastwards until sea defenses were built a century ago, old buildings were gradually lost to the sea. The Western Tower was built in 1597 and was originally in the east of the island.