St. Mary’s Cathedral, Samarinda, is a parish of the Roman Catholic Church in Samarinda, East Kalimantan, Borneo, Indonesia. It is hailed as one of the most beautiful buildings in the city. The cathedral measures up to ± 1,630.5 sqm, the biggest in East Kalimantan, and can accommodate up to 4,000 worshipers.

The new cathedral followed a modern design that displays the cultural heritage of the ethnic Dayak people. The exterior design is similar to the traditional cathedral’s design, however, the colour follows a subtle muted blue that gives the building its modern aesthetic. 

The interior of the cathedral is furnished with a variety of MM Galleri’s natural stones. The church floor is furnished with Fior De Pesco Marble that carries a grey tone with several unique white veins. This helps to elevate the ambience of the church, making it more welcoming. To add a bit of contrast, the steps towards the stage is furnished with black granite to give a sense of stately grandeur. For the special display of the Pieta, Eritrea Red Marble was used to furnish the arch curve above the statue while the background was furnished with black granite.

The building holds a special meaning to MM Galleri as it is a symbol of harmony for the community in the region.