St. Peter's Cathedral Basilica is the "mother church" of the Diocese of London. It is located at the corner of Richmond Street and Dufferin Avenue in the heart of beautiful downtown London, Ontario.

Compared with the ancient cathedrals of Europe, its history is brief but it carries us back to the pioneer days of Ontario, and to conditions which made the building of a church as large and splendid as St. Peter's remarkable achievement.

​

At the dedication of the Cathedral in 1885, Bishop Walsh said, "This cathedral is the expression in stone of the great zeal and love for religion of the noble clergy and generous laity of the whole Diocese and of their cordial union and cooperation with their Bishop, and it will stand for ages an eloquent and enduring monument of their faith, hope and charity."