The Basilica of the National Vow, also known as La Basilica del Voto Nacional in Spanish, is a Roman Catholic church located in the heart of Quito, the capital city of Ecuador. Construction of the church began in 1883 and was completed in 1988, over a century later. The basilica is located on the hill of El Panecillo, overlooking the historic center of Quito.

The Basilica of the National Vow is considered to be one of the largest neo-Gothic churches in the Americas. The church was designed by Ecuadorian architect Julian F. Sordo, and it features several architectural elements inspired by the Gothic cathedrals of Europe, including pointed arches, flying buttresses, and stained glass windows. The exterior of the basilica is adorned with numerous gargoyles, which were inspired by the local fauna of Ecuador.

The interior of the church is also quite impressive, featuring numerous altars, sculptures, and stained glass windows. The nave of the church is lined with several chapels, each dedicated to a different saint. Visitors can climb to the top of the basilica's towers for panoramic views of Quito, which is a popular attraction. The towers are accessible via a narrow staircase that winds up to the top.

The basilica is also notable for the large statue of the Virgin Mary that sits atop the central tower. The statue is made of aluminum and is the largest of its kind in South America. It was designed by Ecuadorian artist Agustin de la Herran Matorras and was installed on the basilica in 1975.

Today, the Basilica of the National Vow is an important landmark in Quito and is one of the most visited tourist attractions in Ecuador. It is also an important religious site, serving as the seat of the Archdiocese of Quito.