5 Euros - Henri I Mersch Castle

Luxembourg's bimetallic collector series, of which this is one installment, was issued specifically to highlight the Grand Duchy's architectural heritage — Mersch Castle, situated in the canton of Mersch in central Luxembourg, dates to at least the 13th century and served variously as a noble residence and administrative seat across several centuries of Luxembourgish history. The niobium core, which the Banque Centrale began incorporating into this series in the early 2000s, was anodized to produce a distinctive coloration unique to each annual release.