In an indeterminate locality of Roncocesi, Roman burial tombs have been found (1). In 980 the court of "Ronchocisoli" (2) is named and after 1052 the castle also exists (3). In the transfer in emphyteusis by the Bishop of Reggio, in 1070, to the Marquis Boniface of Canossa, of several castles, Roncocesi is among those remaining in the possession of the Bishop (4). The imperial privileges, from that of Otto II in 980 to that of Frederick II in 1224, recognize the locality pertaining to the Church of Reggio (5). It then passed into fief to Gherardo da Cavriago who in turn in 1184 gave in level for 29 years the "curtem et castrum seu cappellam... que est posita in loco ubi dicitur Rococesoli" to Count Oberto son of Ardizzone del Contado di Parma (6);In this year appears for the first time the church probably already existing since the tenth century. It should have depended on the Parish Church of Modolena but due to some claims of patronage by the abbess of St. Thomas of Reggio was confirmed at the Monastery by the Bulls of Pope Lucius III in 1184 and others until that of Gregory IX in 1229 (7). Still in 1361 the Bishop invested Feltrino Gonzaga with several assets including "Castrum de Ronchacexulo cum silva Marola"; the castle is no longer named after the fourteenth century (8). The villa is mentioned in the statutes of Reggio and in a map of 1321. In 1447 it is indicated the autonomous municipality, then subject to Reggio, including in the Estimo of 1458, 26 "fires" (9).
In ancient times the villa extended further north, reaching beyond the modern Corso del Crostolo to the Bishop’s road and the Barisello drain where the name of the "Punta di Roncocesi" remains attributed to that fraction belonging to Cadelbosco after the seventeenth century while the whole part of Roncocesi between Crostolo and Guazzatore until the sixteenth century was territory of Sex (10). In 1682 there were 406 inhabitants who rose to 465 at the end of the eighteenth century (11). The primitive church of Roncocesi was located near the Madolena in a fund called S. Biagio (of which we refer to the file) and is named until 1564.The current, new building, was built more to the east in the locality called once "the garden". It was probably started around 1575 and had to be finished around 1620 c. In the middle of the seventeenth century was built the rectory and renovated the church with the addition of the facade. The Visit of Bishop Marliani in 1663 was restored and there was no trace of the old building in S. Biagio (12). New restorations were carried out in 1677-79, 1890 and 1925. Other works on the facade followed in 1928 and finally in 1930 the bell tower was restored (13).The church has a facade, oriented to the east, bipartite by a string-track frame and punctuated by pilasters; the portal architravato is crowned by a frontizpizio with a lowered lunette. The upper part, with arched side fittings, is concluded at the apex by a tympanum - at the center opens a three-light window elegantly squared. In addition to the rectory there is the building of the old tavern and a nineteenth-century majesty with arched niche.