Burg Malbork- Residence of the Teutonic Order, Poland (180/418)

When the seat of the Grand Master of the Teutonic Order moved from Venice to what was then known as Marienburg, the earlier castle was greatly enlarged and embellished. It became the supreme example of the medieval brick castle. It fell into decay later, but in the 19th and early 20th century was meticulously restored; it was here that many of the conservation techniques now accepted as standard were evolved. Following severe damage in World War II it was once again restored, using the detailed documentation prepared by the earlier conservators.