The secular architecture of this period made as great progress as the ecclesiastical architecture, and it is of even greater interest because nearly all the ideas in common use among architects for monumental public buildings or ambitious private structures in our time are adopted and adapted from the architecture of Columbus' Century. As in ecclesiastical {120} architecture, the Renaissance begins in Florence. The erection of two of the magnificent palaces of the city, still well known and admired, the Riccardi, formerly called the Medicean, and the Pitti, were the initial steps. The Riccardi was designed by Michelozzi and has a splendid façade 500 feet in length and 90 feet in height. The Pitti is 490 feet in length, three stories high in the centre, each story 40 feet in height, with immense windows 24 feet apart from centre to centre. They show very well what the architects of this time could accomplish on this grand scale. Both were completed just about the beginning of Columbus' Century. After this, the Florentine buildings became more ornate, and yet with the ornament properly adapted to the structure and producing an effect of beauty that has deservedly won modern admiration and study. Probably the two most famous buildings of the first half of Columbus' Century are the Rucellai and the Guadagni palaces of Florence, the façades of which have been much admired. The Rucellai Palace was designed by Alberti, the Guadagni by Bramante. As their ideas dominated ecclesiastical architecture, so now they were to dominate secular architecture. After Florence comes Venice, and here the wealth of the city, its Oriental affiliations and the light and air of its surroundings gave rise to a series of marvellously beautiful ornate Renaissance buildings, famous throughout the world and especially known to English-speaking people through Ruskin's "Stones of Venice." The most famous of these is the Palazzo Vendramini, which may be permitted to speak for itself. One of the most beautiful buildings in Venice is the Library of St. Mark, situated exactly opposite the Doge's Palace and built by Sansovino. Scarcely less beautiful is San Micheli's masterpiece, the Palace of the Grimani, which is now the post-office. These buildings are familiar to all. To know them is to admire them, and the architects of every progressive structural period since have devoted much study to them. [Illustration: COURT DOGE'S PALACE (VENICE)]