Every year, usually during the second weekend of September, the doors of the most interesting monuments, buildings, premises and areas are opened to the public. That includes those that are otherwise partly or totally inaccessible. The dates of EHD 2008: on 13. - 21.9 2008 http://www.shscms.cz/ehd/en/ Online catalogue : http://www.shscms.cz/ehd/en/katalog/