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Gregor Kalas

Associate Professor

School of Architecture

Gregor Kalas investigates the architecture of late antiquity and the early Middle Ages with a particular focus on the post-classical adaptations of ancient buildings and monuments. In his publications, Kalas explores the reuse of ancient structures by highlighting that architectural reconstruction engages with historical memories and the reconstitution of lapsed time. His book, The Restoration of the Roman Forum in Late Antiquity: Transforming Urban Space (University of Texas Press, 2015), traces the political significance of reestablishing links to the venerable past in downtown Rome during Late Antiquity. Support for Kalas’s research has been awarded by the National Endowment for the Humanities and the Mrs. Giles Whiting Foundation. Kalas has also pursued investigations of late antique urban landscapes by digitally reconstructing the center of Rome in order to reveal the ritual function of buildings and the topographical linkages between significant city spaces. Currently, Kalas’s research concerns the early medieval reuse of public buildings in Rome to establish the church of Santa Maria Antiqua.

Contact Information


  • Ph.D., Bryn Mawr College, 1999
  • M.A., The Johns Hopkins University, 1989
  • B.A., Williams College, 1985

Expertise & Interests

Gregor Kalas’s research focuses on the architecture and urbanism of the later Roman Empire and the early medieval Mediterranean. He is investigating the following projects:

  • The architecture and public monuments of the Roman Forum during late antiquity
  • The reuse of an ancient civic structures to establish the Roman church of SS. Cosma e Damiano
  • The conversion of the basilica Junius Bassus into the fifth-century church of S. Andrea Catabarbara in Rome
  • The display mural paintings, including portraits and icons, in the church of S. Maria Antiqua in Rome
  • The digital reconstruction of the late antique statues displayed publicly in the Roman Forum (research funded by the National Endowment for the Humanities; pursued in collaboration with Diane Favro and Chris Johanson at the Experiential Technologies Center of UCLA)