The date of its construction is uncertain, as well as the existence of other churches on the same site, as it is known a reconstruction was carried on between the end of the 11th and the beginning of the 12th century.
It has been speculated it could have been originated in Lombard times (7th-8th centuries), while other scholars assign it to the subsequent Frankish conquest of northern Italy, when the area was under the counts of Lecco.
Starting from the 14th century, moral and financial scandals undermined its credibility and inexorably began the decline of the complex, which ceased to exist as an institution in July 1407, when it was suppressed.
[2] One of the most notable examples of Romanesque architecture in northern Italy, the Rotonda di San Tomè has a central plan with a pyramidal composition, with three cylindrical volumes put one above the other.
The upper matronaeum has also eight columns which creates a circular ambulatory facing the central hollow of the lower section.
Moreover, Rotonda di San Tomé is one of the churches of Percorso del Romanico (Romanico path) of Lemine, including: The area of the Rotonda di San Tomé hosts many events and manifestations, including: "Mercato Agricolo e non solo", an agricultural market where you can buy artisan food products and see manual demonstrations of artistic crafts in the courtyard of the former convent;[6] "Spring Festival", with a guided tour of the Romanesque church, games for children and a final concert by the local orchestra[7] and "Antico Lemine", a festival of the Middle Ages and the rural renaissance of Almenno that includes meetings, shows and guided tours in the summer.