Chiesa di San Giovanni Battista (Cripta e Labirinto)

The Church of San Giovanni Battista in Pienza, known as the Crypt, preserves sculptural fragments, tapestries and a Renaissance baptismal font beneath the cathedral complex. The galleries called the Labyrinth add evidence of attempts to stabilise and drain the cathedral's apse.

Why it matters

The ensemble connects the remains of medieval Corsignano with Pius II's Renaissance transformation of Pienza. Its engineering history shows that the monumental project required later intervention as well as artistic patronage.

What to notice

Carved fragments from the earlier church of Santa Maria include an architrave with Old Testament scenes. Flemish tapestries and illuminated manuscript material add other forms of religious art. Bernardo Rossellino's workshop made the baptismal font, whose architectural form contrasts with the more utilitarian drainage galleries beneath the apse.

Context and history

The cathedral was built in 1459–1462, incorporating older material into the wider religious setting. Bishop Francesco Maria Piccolomini donated the tapestries in 1593. Restoration in 1932 recovered medieval sculptural pieces. Subsidence had affected the cathedral from the fifteenth century; later drainage and reinforcement works, including the early-twentieth-century galleries, form a separate phase in the conservation of the structure.