Roman Catholic Diocese of Alotau-Sideia
The Roman Catholic Diocese of Alotau-Sideia is a Latin suffragan diocese in the ecclesiastical province of the Metropolitan Roman Catholic Archdiocese of Port Moresby, yet remains dependent on the Roman Congregation for the Missions Propaganda Fide. Its cathedral episcopal see is the Cathedral of the Sacred Heart of Jesus, in Alotau, Milne Bay Province. Coat of arms. The new coat of arms of the Diocese was adopted in 2016. The proposal of coat of arms created Marek Sobola, a heraldic specialist from Slovakia.