Their association remained close after they both left Milan in 150o and when Leonardo visited Rome in 1504 he may well have contributed to the conception of the Tempietto. The strictly symmetrical concentric effect of Bramante's design came near to realizing Alberti's and Leonardo's ideal Christian church: a free-standing centrally planned building crowned with a hemispherical dome symbolizing the universe and reflecting celestial harmony in its proportions and geometry of pure forms. The effect was, however, partly lost by the design not having been fully carried out.