Pontifical Institute for Christian Archaeology

The Pontifical Institute for Christian Archaeology (Italian - Pontificio Istituto di Archeologia Cristiana or PIAC) is an institute for the study of Christian archaeology, based in Rome.

It was founded on 11 December 1925 through Pope Pius XI's papal Motu proprio I primitivi cemeteri, in parallel with the Pontifical Academy of Archaeology and the Pontifical Commission for Sacred Archaeology.

Its first professors were Johann Peter Kirsch, Joseph Wilpert, Henri Quentin, Angelo Silvagni and Enrico Josi.

Since 2022 its Grand Chancellor has been José Tolentino Kardinal Calaça de Mendonça, Prefect of the Dicastery for Culture and Education.

The PIAC's professors form the Permanent Standing Committee of the International Congress for Christian Archaeology.