2,5 Euros Casemates

Luxembourg's 2.5 euro denomination was introduced in 2010 specifically to fund cultural and heritage preservation — a fraction of each coin's face value is directed toward that purpose under Luxembourgish law. The Casemates du Bock, the subject of this issue, are a network of tunnels hewn into the sandstone cliffs of Luxembourg City beginning in 1644 under Spanish Habsburg rule, later expanded by the French and Austrians over the following two centuries.

At their peak, the fortifications housed some 35,000 troops and stabling for horses. UNESCO designated them a World Heritage Site in 1994.