The origins of the church dedicated to St Peter and St Paul was much smaller than the exiting church today.

This smaller church built during the second half of the 18th century to the design of architect Giuseppe Bonnici went through a major enlargement at the onset of the 20th century. The architect who oversaw the works for this enlargement project, Francesco Saverio Sciortino, was constrained by Bonnici’s original structure. Through this project he sought to correct the disjointed external appearance of the former church.

The construction works for the enlargement were completed by the beginning of the 20th century with the new façade exhibiting pyramid-like massing of the volumes with the raised dome and twin bell-towers receded in the background. The lower façade is divided into three parts with the classical temple-front of the nave flanked by the aisles with a segmental pediment and crowned with low unique square-based cupolas with pointed lanterns. The main architectural component at the upper level is the central semi-circular arched structure flanked with engaged pilasters. On top is an elaborate and ornate superstructure which terminates with a raised frontispiece.

The Malta Environment and Planning Authority scheduled the parish church as a Grade 1 monument on August 26, 2011 as per Government Notice 782.