Issued in 1974, this 0.50 franc commemorative stamp celebrates the 47th National Congress of the Federation of French Philatelic Societies, held in Colmar. The design features the iconic Maison Pfister, a 16th-century architectural masterpiece known for its timbered galleries and Renaissance-style oriel windows. Rendered in rich reddish-violet tones, the engraving by Lacaque captures the historic charm of Colmar’s old quarter. A desirable thematic item for collectors of philately-on-stamps, French regional architecture, and congress issues.