Colonia Regina Elena, Summer camp in Calambrone, Italy

Colonia Regina Elena is a former summer camp in Calambrone comprising three interconnected buildings set within grounds planted with pine trees and Mediterranean vegetation. The complex has been repurposed into residential apartments that serve the local community today.

In the early 1930s the Spedali Riuniti of Livorno planned a heliotherapeutic city at Calambrone, and Ghino Venturi designed the Colonia Regina Elena; the executive project was approved on 30 October 1931, works began in February 1932 and the colony was inaugurated in summer 1933. In 1937 it passed to OPAFS, which added a school boarding role to its heliotherapeutic one. It closed in 1977 and was later divided into apartments.

The church beside the colony, dedicated to Santa Rosa, was designed by Ghino Venturi between 1932 and 1934 as part of the service centre for the heliotherapeutic city. It has a basilican plan with a dome over the transept, a facade pierced by long slit windows, and a water tower at the apse, repeating the chapel of the Livorno hospital.

The complex stands at Viale Tirreno 76, on the lot between the Calambrone beach and the road linking Marina di Pisa to Livorno, with the Colonia Principi di Piemonte and the Rosa Maltoni Mussolini colony as neighbours. Entry is from a gate on the main road, beside a small masonry porter's lodge now turned into a studio flat. The grounds cover 27,045 square metres and are fenced and planted with pines, palms and Mediterranean shrubs; the three original buildings are linked by a continuous portico.

The general plan of the complex once traced the outline of a fascio, the bundle symbol of the Fascist regime. The three original buildings are joined by a continuous covered portico, and the two blocks facing the sea have semicylindrical stair towers projecting from their walls.