The Restiturm, or Burgruine Resti, is a ruined castle in the municipality of Meiringen in the Swiss canton of Bern. The original castle was built in the 13th century and has been rebuilt several times. The castle is situated at the foot of the Hasliberges. The best preserved part of the castle is its tower, which still stands to this day. An examination of the castle interior reveals that the castle was constructed inside out, with the core's construction beginning in 1250. It took another 50 years before the iconic tower was completed.