This attractive 1966 semi-postal set from Belgium highlights important historical and religious landmarks of the Liège region. The stamps depict the Charter of Huy commemorative design, the historic Frères Mineurs (Minderbroeders) complex in Liège, and the Abbaye du Val-Dieu at Aubel, each rendered in finely engraved architectural detail. Issued with surtaxes to support charitable causes, the series combines cultural heritage with philanthropic purpose, making it especially appealing to thematic collectors of architecture, monasteries, and Belgian regional history. The balanced color schemes and precise line engraving typify Belgium’s high-quality mid-20th-century stamp production. Well-preserved complete sets are valued additions to European charity and historic-sites collections.