Located on a landing on a small hill, at the foot of Cap de Grill, in the town centre of Cantallops. Along with the Romanesque chapel of Saint Sepulcher d'Olèrdola, it is the only religious building with a circular plan existing in the Penedès. It is a unique building, highly visible from all around. It has an emblematic character, and an image of Santa Margarida is venerated inside. In addition, the cross above the altar was a baroque processional cross.

It is suffragan of the parish of Sant Pere d'Avinyó.

There are historical precedents for the existence of a chapel of Santa Margarida, thus, in 1579, Jaume Peipo d'Avinyonet, left an amount to repair the Chapel of Santa Margarida de Cantallops in his will, and in 1729 the General Visitor of the parish of Sant Pere d'Avinyó orders the workers of Avinyonet to go and repair the chapel of Santa Margarida de Cantallops (ESCOFET, 1981).

One of the signs of identity of Cantallops is the church that dominates the town, which was consecrated on July 20, 1975, by Bishop Capmany. At the beginning of 1975, the Cantallops church (which is still standing on the road) had a big crack, and the road had to be crossed and it was dangerous. As a result of the collective push, in April, the Fortuny Algueró family had already ceded a plot of land in Cap de Gruill, and the plans had already been drawn up, as well as all the papers in order. On the 14th, construction began on the new building, and three months later, on July 20, it was inaugurated.

Everyone worked to make the project a reality, under the charge of the town's two masons (Joan Ràfols and Josep Guilera). Sundays were the days of maximum activity. It is explained that for the Virgin of Montserrat, on April 27, more than 3,000 torches were placed. However, there were delicate moments, such as when the dome was made, or when the bell or the cross was placed.

The round shape of the church was difficult to assimilate at first, but over time it became an identity sign. It was a characteristic feature of the town. In the middle of construction, there were people asking if it was a water tank or a bullring. When it was finished and painted, it was also said to look like a strawberry shortcake. But, in reality, many people recognised Cantallops by the circular church (GUILERA ALEMANY, 2000).

Devotion to Saint Margaret, to whom the current church is dedicated, was quite present in medieval times. Geographically close is the antecedent of this invocation to Santa Maria de Llinda, in the ruined chapel of the 10th century. It is interesting the historical coincidence of the existence, in 11th century documentation, of a Llop-Sanç, settled in the vicinity of Llinda in lands that include the "Campo de Lupo" (Cantallops?), entrusted in 1176 to Bertran de Solario, the owner of Mas Bertran, by the monastery of Sant Cugat (MARGARIT, 1983a).

The old church that is located on Santa Margarida Street (which follows the route of the national road, was built by Llopart's father between 1952 and 1958. It was paid for by the town and the rich owners. The stone it was brought from the quarries that can still be seen under the Gunyoles cemetery (oral information, Julià Marcè).

Before the Civil War there was another chapel of Santa Margarida near Camí dels Xops, with a small, cobbled quarter marked by low gates.