How a sandbagged wall saved Leonardo da Vinci’s masterpiece from total destruction in 1943

Countries & Cities · Published 29 September 2026 Swipe more like this →

In short: The Santa Maria delle Grazie in Milan is a UNESCO World Heritage site, but its most famous treasure, The Last Supper, nearly vanished during World War II. When Allied bombs struck the convent in 1943, the mural survived only because of a desperate, last-minute effort to shield the refectory wall.

Commissioned by Francesco I Sforza, the church began as a Dominican convent built over a prior chapel. By 1469, architect Guiniforte Solari had completed the Gothic nave. Later, Duke Ludovico Sforza transformed the site into his family burial ground, commissioning a new cloister and apse. While Donato Bramante is often credited with the apse and dome design—evidenced by a 1494 inscription—his actual involvement remains a subject of historical debate, with some scholars pointing toward Giovanni Antonio Amadeo instead.

The church’s artistic legacy extends far beyond Leonardo. In 1543, a Titian altarpiece was installed in the Chapel of the Holy Crown, though it was later looted by French forces in 1797 and moved to the Louvre. The site also houses works by Gaudenzio Ferrari, Bramantino, and Bernardo Zenale. Today, the Old Sacristy, designed by Bramante, serves as a cultural hub for the Dominican order, hosting lectures and concerts that bridge spirituality with contemporary philosophy and art.

The survival of The Last Supper remains the site's most remarkable narrative. During the aerial bombardment on 15 August 1943, the refectory was largely leveled, yet the wall protected by sandbags held firm. Following centuries of well-intentioned but damaging restoration attempts, a massive conservation project launched in 1978 and finished in 1999 finally stabilized the mural. By controlling the refectory’s environment to mitigate dust, fumes, and humidity, experts believe they have secured the painting’s future for centuries to come.

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