After our Barasoain Church visit, Jandy and I proceeded on our way to the nearby Minor Basilica of Our Lady of the Immaculate Conception, the ecclesiastical seat of the Diocese of Malolos.  Located in front of the city hall, this Neo-Classical church, and its convent, were first built with light materials in 1591, rebuilt and enlarged in 1691 by Fr.  Roque Barrionuevo, rebuilt with stronger materials in 1734 by Fr. Fernando Sanchez and completed in 1740 by Fr. Juan de Meseguer. Fr. Jose de Vivar did minor restorations in 1753.  Both were destroyed by fire in 1813. From 1963, several restorations were pursued by Engr. Alfredo Aldaba, affecting the facade, dome, transept and main altar.  The present church was started in 1819 by Fr. Melchor Fernandez and consecrated on October 14, 1826.  Severely damaged during the June 3, 1863 earthquake, it was restored from 1859 to 1872 by Fr. Ezekiel Moreno.

The convent was damaged during the July 19, 1880 earthquake, restored in 1883 by Fr. Juan M. Tombo and completed in 1884 by Fr. Felipe Garcia. It was the official residence (Palacio Presidential) of Pres. Emilio Aguinaldo from September 10, 1898 to March 29, 1899.  The convent was reconstructed in 1975.  In 1976, both church and convent were blessed  by Rev. Bruno Torpigliani, the Apostolic Nuncio to the Philippines.

The basilica has a moderately-decorated, symmetrical facade divided into 3 segments by superpositioned Doric columns and dominated by large, semicircular arched openings on the first level.  The triangular pediment, decorated by a stylized Augustinian emblem at the center, is topped by acroteria and torch-like finials.  The horizontal Doric frieze is decorated with triglyphs and the fluted pilaster-flanked, statued niche is topped by a segmented canopy crowning the tilted frame of the center window.

The basilica has a slender, 4-storey bell tower on its right.  It used to have a triangular cone which was replaced, during the basilica’s renovation in 1970, by a concrete statue of the Immaculate Conception (donated by Amparo Bautista).

In front of the basilica (at the right side of the plaza) is a 12-m. high siar tree (Peltophorum pterocarpum), now known as the Kalayaan Tree.  It was said to have been planted by Gen. Aguinaldo during a lull in the convention. proceedings.  Under this tree is a monument depicting a meeting of Filipino revolutionaries Gregorio del Pilar, Isidoro Torres, Don Pablo Tecson, Fr. Mariano Sevilla and Dona Basilia Tantoco.