The ancient parish church of Argegno was located in the square of the medieval village, but at the beginning of the twentieth century presented a serious risk of collapse on adjacent houses. After saving the sacred furnishings, the old church was demolished and a new church was built adjacent to the port and dedicated to the Santissima Trinità.
The new church was built in the early twentieth century, in eclectic style taking the stone of the lake back in the perimeter walls, in the bell tower the single-arched and double-arched windows of Romanesque tradition of the Maestri Comacini and in the façade a neo-gothic rose window reminiscent of the original one of Santa Tecla in Torno.
Inside there are the furniture elements of the ancient demolished church. The church entrance opens on the lake with a beautiful planted churchyard, from which one can enjoy a unique panorama.