The parish church of San Cosme and San Damián de Covarrubias is a Catholic building that may still be found there. It is part of the municipality of Covarrubias in the province of Burgos.

At this time, it is regarded as a BIC (Bien de Interés Cultural) (it was declared a Historic-Artistic Monument belonging to the National Artistic Treasure by decree of 3 June 19311).

The current late Gothic church was started in 1474 and was constructed on top of an earlier Romanesque church. It was ordered by King Enrique IV's chaplain, Abbot Diego Fernández, although construction was postponed throughout the majority of the monarchy's time in power. Its three naves are arranged in a Latin cross, with the centre nave being higher than the side naves. A simple tercelet vault or a sexpartite vault covers the naves and transept. The cathedral is filled with the tombs of several families, including those of Martnez Lerma, Fernández Velasco, Gil de Ramales, Cisneros, Fernández de Castro, Fernández de Solarana, Villegas, and others. The organ was built in the latter half of the seventeenth century.

The church's main altarpiece was created between 1751 and 1753 by the retablists and carvers Francisco Echevarra and brothers Luis and Manuel Cortés del Valle. It stands on a bench, has three sections, an attic, and is dedicated to San Cosme and San Damián. The tabernacle-ostensory is located in the middle of the lowest portion. In the attic, the Assumption of the Virgin is positioned between two deacons, Saint Stephen the Protomartyr and Saint Lawrence, with the images of Saints Cosmas and Damian placed above it behind a canopy and flanked by those of Saints Peter and Paul.

The tombs of Count Fernán González and his wife Sancha de Pamplona, which were moved from the convent of San Pedro de Arlanza in 1841, are located in the presbytery. The remains of the Count are interred in a 5th-century tomb that was discovered in a village in the Alfoz de Lara in the 17th century without a cover, while those of the Countess Sancha are interred in a 4th-century Hispano-Roman tomb. The tomb of Garca Alonso de Covarrubias, the college church's abbot, is located on the Gospel side of the main chapel.

The Infanta Sancha Raimundez is actually buried in the Pantheon of Kings in San Isidoro de León, where her mummified corpse is preserved incorrupt, but her tomb is located in the presbytery of the church, next to the tombs containing the remains of Queen Urraca Fernández and Urraca Garca. The stone tomb dates to the 15th century. In the year 1148, the Infanta Sancha Raimndez gifted her Fueros to the town of Covarrubias. 3 The abbey cross and the quartered coat of arms of Castile and León, which were given to the Infanta Sancha by her brother the king, are sculpted on the lid of the tomb that bears the Infanta Sancha's name.

The church has other chapels, including the Santsimo chapel, also known as the "Santos Mártires" (Holy Martyrs) because its altarpiece is dominated by the processional images of the martyrs Cosme and Damián, who serve as the church's patrons. The Santsimo chapel is at the bottom of the church on the Gospel side and is covered by an elegant crested vault that is credited to Simón de Colonia. The Romanesque baptismal font from the 11th and 12th centuries, with its straightforward quatrefoil ornamentation, is still on display in the chapel of Carmen or the remains. Another significant chapel is the Holy Kings Chapel, which once housed the magnificent triptych of the Magi that gave the chapel its name and can now be seen in the parish museum. A 16th-century Plateresque altarpiece dedicated to Saint John the Baptist currently stands in the chapel's place.

The Gothic tomb of the Infanta Cristina of Norway, first wife of the Infante Philip of Castile and Swabia, son of Ferdinand III and brother of Alfonso X the Wise, is located in the cloister, which was constructed in the early 16th century.

The grave of Diego Fernández de Castro, the college church's abbot who was brought here from the chapel of Nuestra Seora del Rosario, is located next to the Infanta Cristina of Norway's tomb.