Coat of arms of the Italian Bishop Camillo Ballin, Vicar Apostolic of Northern Arabia.
"Argent, on a fess Azure charged of a phoenix on its immortality Or flamed of Gules, the monogram "XP" between the letters "A" and "Ω" all of the fourth in chief, three wavy bars below a seven points star of the second in base ".
The scroll with the MOTTO ( "IN VERBO TUO" ) written in black.
Reference:

www.avona.org
Own work
SajoR