Saint Seraphim Cathedral, is an Eastern Orthodox cathedral located in the Oak Lawn neighborhood of Dallas, Texas. It is the episcopal seat of the Orthodox Church in America Diocese of the South, sharing its status with Christ the Saviour Cathedral in Miami Lakes, Florida. The cathedral is named after St. Seraphim of Sarov.

Archbishop Dmitri was a hierarch of the Orthodox Church in America. He served as archbishop of the church's Diocese of the South from 1978 to 2009 and was the ruling bishop of the Mexican Exarchate from 1972 to 2008. The territory of the diocese covered fourteen states in the United States – Alabama, Arkansas, Florida, Georgia, Kentucky, Louisiana, Mississippi, New Mexico, North Carolina, Oklahoma, South Carolina, Tennessee, Texas, and Virginia. In Orthodox Christian circles he is sometimes called the Apostle to the South.