During the Renaissance, artists began using perspective and vanishing points to make their artwork have depth and appear realistic. Many artists also incorporated classical features into their work, such as columns, arches, and copies of classical buildings. In "The Ideal City", there are many Roman buildings such as the Colloseum, and an arch which in Rome commemorated military victories. Also, in "Perspective Scenery", the foreground consists of an arch with columns lining it, which is very Roman. Artists in the Renaissance also started drawing people using perspective, as is seen in "The Ideal City" and "St. Bernardino Preaching". This use of perspective makes the people look more human and real than in prior art periods. This new perspective was achieved by drawing orthogonals which headed into the vanishing point. This caused a three dimensional appearance on a two dimensional surface.