The Parish of St. Peter is not far from Loro and it is in a little village at 381 m. a.s.l. called Gropina. It dates to the VIII century, at least, and an ancient apocryphal document tells that it even belonged to Charlemagne, the founder of the Sacred Roman Empire in 780.

According to this apocryphal act, therefore, the parish was given to the monastery of Nonantola in the Emilia region. More news on the church dates to 1016 and to 1191 when another emperor, Henry VI, ceded the territories connected to the parish to the counts Guidi, his loyal feudatories, who got it until the beginning of the XIV century. Later, the church established its direct dominion in the area and it granted benefices to different people in the figures of Innocent VIII, first, and Leo X, later.
Yet, since 1515 Leone X, who had ties with the Medici's Grand Duchy of Tuscany since he was Lorenzo the Magnificent's son, he transferred the ownership of the parish to the Capitolo della Metropolitana of Florence. The parish kept the traces of the historic figure of this pope on the door lintel. In effect, Leo X's emblem, dating to 1522, is carved near a seraph. Before becoming part of the properties of the Florentine Capitolo the façade of the church underwent some changes. The works interested the entrance and the mullioned windows with two openings, that, therefore, do not appear perfectly lined up.
At the beginning of its existence, the parish of Gropina benefited from its closeness to the most important ways the pilgrims used to walk. It can be asserted that it was one of the points of reference in the territory of Loro for a long time, both from a spiritual point of view as well as regarded its economy in the surrounding village. Yet, in the late medieval and modern times, its prestige slowly started to decline and the nearby started to depopulate so much that in 1883 Gropina had less of 200 inhabitants while the economy of Loro was taking off again.
The inside of the church id divided into one nave and two isles (the central one is bigger than the others) and each of them is crossed by a row of columns with richly decorated capitals. The crypt that has recently been restored and that can be visited today is connected to the right aisle. Just during the restructuring works, the foundations of two previous churches and of Roman and Lombard structures have been discovered.