What term refers to the doors in the center of the iconostasis that lead directly to the altar?

The term that refers to the doors in the center of the iconostasis leading directly to the altar is known as "Royal doors." These doors are significant in Eastern Orthodox and Eastern Catholic liturgical practice as they provide access to the sanctuary or altar area, which is considered the most sacred part of the church.

The name "Royal doors" reflects their importance and honor in the liturgy, symbolizing the entrance to the heavenly realm and the divine presence. They are typically adorned with icons depicting major events in the life of Christ and the Virgin Mary, further emphasizing their spiritual significance. The Royal doors are opened during specific moments in the liturgical service, allowing priests to proceed to and from the altar, thus highlighting their role in the worship and sacramental life of the church.