Trinity Cathedral, the seat of the Episcopal Diocese of Ohio, was designed by "Millionaire's Row" architect Charles F. Schweinfurth and built in 1901-07 of Indiana limestone in the Gothic style. It is connected to an older parish house built in 1895 and Trinity Commons, constructed in recent years. Trinity Cathedral's forerunner, Trinity Parish, was Cleveland's first church building.
The church has a long history of community outreach and social activism, reaching out through the Church Home for the Sick and Friendless as early as the 1850s. The cathedral transcended its socially prominent Millionaire's Row connection to embrace racial integration in the 1960s and has more recently ministered to the homeless; adopted a modern, ecumenical liturgy; and championed openness toward homosexuals in a time of denominational dissension.