Italy, Tuscany, Siena, Angular view of a section of the facade of Siena Cathedral from Piazza del Duomo.

Italy, Tuscany, Siena, View of the upper facade of Siena Cathedral from Piazza del Duomo.

Italy, Tuscany, Siena, View of the facade of Siena Cathedral from Piazza del Duomo.

Italy, Liguria, Cinque Terre, Vernazza, Colourful beach umbrellas in front of traditional shuttered apartments at the town̢۪s harbour with clothes hanging out to dry.

Italy, Liguria, Cinque Terre, Vernazza, Colourful beach umbrellas in front of traditional shuttered windows at the town̢۪s harbour.

Italy, Veneto, Venice, Burano, colourful window detail.

Italy, Veneto, Venice, Doge & Lion, Palazzo Ducale.

Italy, Veneto, Venice, window detail with Doge & Lion, Palazzo Ducale.

Italy, Veneto, Venice, window detail, Palazzo Ducale.

Italy, Trentino Alto Adige, Trento, Palazzo Quetta Alberti Colico window detail.

Italy, Trentino Alto Adige, Trento, Palazzo Quetta Alberti Colico window detail.

Italy, Lombardy, Milan, 17th Century stained glass window, Room XIV, Sforza Castle.