Church renovations started in the late 1960s but gained momentum with the publication of the aforementioned document. Examples of typical changes seen in the renovations include the removal of the high altar, side altars, altar rails, baldacchini, religious artwork, statues of the saints, elevated pulpits and non-face-to-face confessionals. In some cases, the sanctuary was extended into the nave which would reduce available seating for the congregation and modify the original architect's vision for line of sight and symmetry. Seating for the laity was occasionally placed in the apse or old sanctuary to create a "theater in the round" concept. Reredos, altar screens, and baldacchini were removed, leaving sanctuary walls bare and historic churches without a central focus. Perhaps most controversially, in many renovated churches the tabernacle was removed from the sanctuary and placed in a distinct part of the church, such as a side altar or even a separate Blessed Sacrament chapel.