The church of St. Eulalia appears to be documented as early as 1371 as the parish church of the appendix of Lapola, a term then used to refer to the current historic Marina district. The building’s present form is mainly due to the heavy restoration work carried out in 1919 by Eng. Riccardo Simonetti, making it arduous to read both the original parts and the sixteenth-century remakes. The concept of architectural space that characterizes the Gothic-Catalan buildings erected in southern Sardinia still survives. In 1990, during restoration work on the sacristy, archaeological excavations began, which, over the years, have unearthed an archaeological area extending beneath the church. These are the remains of the ancient city of Cagliari ranging from the late Republican age (2nd-3rd centuries B.C.) to modern times. Outside, the façade is gabled with three-lobed hanging arches and a large rose window over the entrance door, originally very similar to that on the façade of San Nicola di Guspini; on the right flank, the late Gothic square-bore bell tower was raised in 1796, demolished in the 1919 restorations and replaced by a cuspidate element still present.
