(Rochester NY) Another more modern structure the First Unitarian Church has been called Rochester’s must-see for architectural historians. The architect was Louis Kahn, one of leading 20th century architects of his time. All the materials used were ones that did not need an added finish: brick, exposed wood, concrete block, and poured concrete. In areas to be covered by poured concrete, which he called "liquid stone" Kahn considered carefully the fact that the hardened concrete surface would bear the impression of the wooden forms. Kahn took into account the Unitarian faith when he designed the building… placing the sanctuary, an area of questioning directly in the center with surrounding corridors and classrooms representing places of learning.