Issued by Monaco, this 1958 1-Franc stamp commemorates the centenary (1858–1958) of the proclamation of the Immaculate Conception. The finely engraved design features Saint Pius X in reverent pose alongside a luminous statue of the Virgin Mary, symbolizing devotion and Marian faith. Printed in elegant brown and slate-blue tones, the artwork shows classic mid-century European line engraving with strong religious iconography. The bilingual inscriptions and balanced composition make it visually striking and thematically cohesive. A desirable piece for collectors of Vatican, Marian, or religious-themed philately. Excellent addition to faith, Europe, or engraved-art collections.