The town's name is very old. In fact, Laglio was founded by the Romans who, according to the famous historian Paolo Giovio, called it Lelium. The foundation should date from the first century BC, period in which the Romans imposed their rule over Lake Como. .

Monuments:
Parish church of St. Giorgio / St. Giorgio stands on the site of an old oratory dedicated to St. George. The oratory, first mentioned in 1184, was converted into a church in 1226. At present, the church has simple triangular façade with an 18th century portal surmounted by a niche containing a copy of the statue of St. George. In the mid 1700, the building was richly decored by refined artists such as Salterio, Camparetti and the painter Alessandro Ferretti from Castiglione d'Intelvi.

Church of St. Bartolomeo / Located in the upper part of the hamlet of Torriggia, the church is perched on the mountain overlooking Lake Como. The building is old and was first described in 1593. Inside, it has a single nave. Its false façade is adorned with a 17th century painting portraying a 'Madonna dello Scapolare'. The façade was reconstructed in 1929-30. On the right side of the church stands the little chapel of St. Rocco which houses a wooden statue of the saint on the altar.

Chapels of the Via Crucis / This Via Crucis (Way of the Cross) starts near the chapel of St. Rocco and finish at the church in Germanello. The 14 stations date back to the 18th century and are a work by the painter Sibella. In 1983, they were completely restored. The restoration work was directed by the painter Andrea Mandelli from Bergamo.