Carlo Celli (Trieste, 1936), graduated at Venice in 1963, Luciano Celli (Trieste, 1940), graduated in Venice in 1964 and Dario Tognon (Pula, 1936 - Trieste, 2008), graduated at Venice in 1964, founded Studio Celli Tognon in 1964. The firm has participated in numerous international competitions (Shinkenchiku Residential Design Competition in Florence, Administrative Centr Les Halles in Tokyo, the Guggenheim Museum in Venice, the castles of Romeo and Juliet in Montecchio, the headquarters of the Cassa di Risparmio di Rimini, the monument the Resistance in Como, the Udine theater Center, the headquarters of the Region Friuli Venezia Giulia in Trieste, the new Paris Opera, the regional parliament of lower Austria in St. Poelten-Vienna, Diomedes Competition in New York).