Answer:
The first is an onion dome. The second is a barrel vault. The third is a rotunda dome. The fourth is a corbel arch.
The title of this example of art is Sarcophagus of the church of Santa Maria Antiqua.
It does contain Christian symbolism that was unrecognizable by pagans. It was also possibly made to be the tomb of a rich Christian living in the third century. It was made in 275 CE and contains the representations of many Biblical and non-biblical people.
Felt that-
thanks for the points! :p
<span> Silla, Koguryo, and Paekche.</span>
