There are four Orthodox churches in Singapore, but they are all
under different Churches.
St Mary and St Mark Church is under the jurisdiction of the Coptic
Diocese of Sydney.
Holy Resurrection Orthodox Christian Church of Singapore is under
the jurisdiction of the Orthodox Metropolitanate of Hong Kong and
Southeast Asia, Ecumenical Patriarchate of Constantinople
St Thomas Orthodox Syrian Cathedral is under the jurisdiction of
the Malankara Mar Thoma Syrian Church.
Mar Thoma Syrian Church is under the jurisdiction of the Mar Thoma
Syrian Church of Malabar, Diocese of Malaysia and Singapore. This
'Eastern' Church is peculiar because they are in communion with
Anglicanism. In a sense, they are Eastern Protestants.