The Parish Church of San Esteban is one of Lominchar's most notable monuments. Built between the 16th and 17th centuries, this church is a clear example of the religious architecture of the period in the region. Its design is Renaissance in style with Baroque elements added during later renovations.
The interior of the church features an impressive main nave and several side chapels, decorated with altarpieces and valuable religious artwork. Among the most notable pieces is a 17th-century main altarpiece depicting scenes from the life of Saint Stephen, the church's patron saint. Also notable is the bell tower, which offers panoramic views of the village and its surroundings.