The center of the iconostasis in an Orthodox church is a "royal" example of these structures that lies between the nave and the sanctuary.
During the Extraordinary Jubilee of Mercy, Pope Francis declared that an example of these structures should be designated in each diocese; he did that so that plenary indulgence could be gained without traveling to Rome, since each Catholic Holy Year begins and ends with a ceremony at one of these structures. A diptych of the Annunciation is usually found on some of these structures which are called "red" in Russian tradition, and which are placed in front of the (*) altar. The center of the iconostasis in an Orthodox church is a "royal" example of these structures that lies between the nave and the sanctuary. Jacopo della Quercia participated in an early 14th century competition to design one of these structures in Florence; Michelangelo said that competition's winner depicted paradise. For 10 points, identify these structures, one of which was made for the Florence Baptistry by Lorenzo Ghiberti.
During the Extraordinary Jubilee of Mercy, Pope Francis declared that an example of these structures should be designated in each diocese; he did that so that plenary indulgence could be gained without traveling to Rome, since each Catholic Holy Year begins and ends with a ceremony at one of these structures.
(holy) doors [or holy gates]