Copyright (1923) J Hillen

Found the location!!

Location: Bourke Street Primary School, Surrey Hills
Standing at back : Unknown male, Unknown male, Unknown male, Unknown male. Unknown male, Panagiotis Chlentzos?, Unknown male, Unknown male, Demetrios Chlentzos (James Bylos), Unknown male
Standing: Unknown male, Unknown female, Unknown female, Unknown female, Unknown female, Unknown female
Seated: Unknown child, Unknown female, Unknown female, Groom Unknown, Bride unknown, Unknown female, Adna Bylos
Seated floor: Unknown male child, Helen (Leni) Bylos, Unknown female child, William (Billy) Andrew Bylos

Does anyone know whose wedding this was, and who the guests are?