Issued by Luxembourg in 1966, this finely engraved four-stamp set commemorates the 1000th anniversary (966–1966) associated with the historic Notre-Dame Cathedral tradition. Each stamp highlights a distinct artistic and devotional element: the majestic Gothic interior (2f), sculptural architectural detail (6f), symbolic keys and heraldic emblems (1.50f), and the revered Madonna and Child (3f). Designed with medieval-style typography and printed by Joh. Enschedé, the set reflects Luxembourg’s rich ecclesiastical heritage. The harmonious color palette—red, brown, green, and blue—enhances display appeal. A beautiful thematic addition for collectors of architecture, religion, and European cathedral issues.