This Belgian semi-postal stamp features a finely rendered portrait of Johanna (Joanna) of Castile (1479–1555), framed within an ornate Gothic architectural border typical of Belgian artistic charity issues. Issued with a 1 Franc face value plus a 15-centime surtax, the stamp supported Red Cross humanitarian programs, a hallmark of Belgium’s prolific semi-postal tradition. The deep rose-red engraving highlights both the regal attire and the period castle in the background, making it especially appealing to thematic collectors—royalty, European history, and charity stamps. A classic mid-20th-century Belgian production admired for its elegance and crisp typographic inscriptions in both French and Dutch.