Seen from outside, it is a beautiful church dating back to the late 15th century, with its colours, the grey ashlars on the façade and the yellow plaster, that integrate nicely with the façades of the houses in the historic centre of Tuili and with the landscape at the foot of the Giara Park. However, the Church of San Pietro’s real treasure lies inside it: the majestic retable, the altarpiece created by the Master of Castelsardo. In reality, there is no certain information about the artist. It is assumed that he came from Barcelona and worked mainly in what was then Castel Aragonese, today’s Castelsardo. The work was commissioned by the feudal lords of Tuili, the Santa Cruz family, and carried out at the end of the 15th century. You can admire it in the first chapel to the right of the entrance, dedicated to the Madonna del Carmine (Our Lady of Mount Carmel): it is five and a half metres high and three and a half metres wide, the decorative pattern is the classic one used for altarpieces, with the Madonna with child in the central-lower section and the Crucifixion above. On the sides, there are images of saints, while episodes from the life of Saint Peter are depicted on the predella.

The masterpiece by the Master of Castelsardo is not the only source of pride in San Pietro di Tuili, which also contains a precious eighteenth-century organ and another retable, dedicated to Pentecost and located in the chapel of the same name. It is one of the six side chapels, on each side, alongside the single nave of the church. The chapels are all barrel vaulted, except for the third on the left, which has a cross vault and is perhaps the only space surviving from the original Catalan-Gothic structure of the religious building. The façade is made up of rows of squared ashlars, with an arched window aligned with the portal and a crowning element with spiral motifs which closes the façade at the top. On the sides, you will notice the buttresses and, leaning against the left side, the square-shaped bell tower, divided into four orders separated by cornices, the last one of which has an octagonal layout.

Walking around the church, in the historic centre, you can admire the numerous portals typical of Campidano houses. Continuing the cultural tour, you can visit the Oil and Olive Tree Museums, located in the elegant Villa Asquer and Villa Pitzalis, built in Neoclassical style. In the outskirts, stands the Church of Sant’Antonio Abate, in Spanish colonial style, around which there are still a few cumbessias – lodgings to accommodate worshippers during the novena -, the celebration of which is the most heartfelt in the village. From Tuili, you can set off to discover the Giara: inside the park, amidst holm oak woods, centuries-old olive trees and is paulis – seasonal ponds - you can see hares, foxes and birds of prey, as well as the famous residents, the little Giara horses.