The underground St. Virgil’s Chapel is one of the most fascinating historical treasures in downtown Vienna. Its history dates back to the early 13th century. It was originally built around 1220–1230 as an underground sacred space and was presumably intended to serve as a crypt for a planned larger church complex.
Later, the above-ground St. Mary Magdalene Chapel was built directly above it on the site of the former cemetery surrounding St. Stephen’s Cathedral. When this above-ground church was destroyed by fire in 1781 and subsequently demolished, the Virgil Chapel was filled with rubble. It subsequently fell into complete obscurity for nearly two centuries.
Sensational rediscovery during subway construction

It was not until construction work on Vienna’s U1 subway line in 1973 that the structure was spectacularly rediscovered. While excavating a shaft about twelve meters below ground , workers were surprised to uncover the intact medieval masonry. Instead of demolishing the structure, the City of Vienna adapted the construction of the Stephansplatz subway station to preserve this historical heritage. Over the course of many months of manual labor, the space was cleared of rubble and carefully preserved through archaeological conservation.
Anyone walking above ground across the bustling Stephansplatz today can see the extent of this buried history right beneath their feet. Light and red stone lines in the square’s pavement precisely trace the floor plan of the former St. Mary Magdalene Chapel as well as the Virgil Chapel lying beneath it.
The Virgil Chapel: A Gothic Architectural Gem Deep Beneath the Ground

Today, the St. Virgil Chapel serves as a branch of the Wien Museum. Visitors can access this atmospheric space directly from the subway passageway. Inside, one can marvel at one of Vienna’s best-preserved Gothic sacred spaces, characterized by imposing vaulted architecture and the distinctive red-painted wall crosses.
In addition to the chapel itself, the adjacent rooms house a compact, permanent educational museum exhibition. There, visitors can view historical exhibits, archaeological finds from Stephansplatz, and informative displays that offer a fascinating insight into the life and development of medieval Vienna.