Question

What is an apse?
a.
the section of the sanctuary with the altar
b.
a semi-circular section of the sanctuary covered by hemispherical vault
c.
the long, narrow section leading to the dome
d.
none of the above

Answer 1

b. A semicircular (or polygonal) recess at the end of a church, often covered by a hemispherical (semi‑dome) vault and typically containing the altar.