Crossword Puzzle Riga religious meeting?

Clue: Riga religious meeting?

Re religious meetings (SYNODIC with 7 letters)
Religious sect member (MENNONITE with 9 letters)
The Magician from Riga (TAL with 3 letters)
Religious image (Var.) (IKON with 4 letters)
Religious folks who like to toss ideas back and forth? (FRISBEETERIANS with 14 letters)
Rigatoni (PASTA with 5 letters)
Site of 1945 Big Three meeting (YALTA with 5 letters)
PTA meeting place (SCH with 3 letters)
List at a meeting (AGENDA with 6 letters)
Rigatoni kin (ZITI with 4 letters)