Where does “оратория” come from?

оратория (Russian) comes from Italian oratorio, from Latin ōrātōrius, from Latin -tōrius, from Latin -tor, from Proto-Italic -tōr, from Proto-Indo-European -tōr, from Proto-Indo-European -tor-s.

Ancestry of “оратория”, step by step

Step	Language	Word	Meaning
1	Italian	oratorio	oratorical; solemn; oratory
2	Latin	ōrātōrius	oratorical
3	Latin	-tōrius	ory
4	Latin	-tor	-er
5	Proto-Italic	-tōr	Forms agent nouns to verb stems
6	Proto-Indo-European	-tōr	Derives agent nouns from verbs, denoting someone...
7	Proto-Indo-European	-tor-s	—

Words derived from “оратория”

оратория

Every word from Proto-Indo-European -tor-s →