Sanctum examines the gardens of the City of London that sit on the sites of churches destroyed during the Great Fire of 1666 and the Blitz of 1940–41. Rather than rebuild, several of these sites were reimagined as public gardens, where elements of original masonry remain and planting and design subtly reference the lost architecture. Writing in 1945, architect Sir Hugh Casson observed that the bombed churches of London possessed a “strange beauty,” precisely because their damage remained visible. He warned that if all war damage were rebuilt seamlessly, “the ordeal through which we passed” might lose its physical presence, and with it the record of collective experience. These gardens retain those visible scars, with planting introduced within the ruins. Across eight sites, the photographs explore the relationship between plants and stone, history and renewal, as these gardens continue the civic role once held by the churches—offering shared space and pause. Each remains in its own way a sanctum.