St. Joseph's Metropolitan Cathedral, also known as Palayam Palli, is the Roman Catholic Latin Rite cathedral of the Archdiocese of Trivandrum.

The final stage of extension, including the Gothic style facade and the bell-tower was completed in 1927.

The three bells were brought from Belgium and were named Joseph, Xavier, and Aloysius in honour of, respectively, Saint Joseph, the patron of the church; Saint Francis Xavier, the apostle of India; and Bishop Aloysius Maria Benziger, the pioneer missionary-bishop of Quilon.

The cathedral has a statue of its patron St. Joseph with the Child Jesus in the middle of the facade and a statue of Jesus with hands raised atop the tower.

The church which is white in colour was painted red from 1927 to 2010.