Among canon of classical orders of classical architecture, the Tuscan order's place is due to the influence of the Italian  Sebastiano Serlio, who meticulously described the five orders including a "Tuscan order", "the solidest and least ornate", in his fourth book of Regole generali di architettura sopra le cinque maniere de gli edifici (1537). Though Fra Giocondo had attempted a first illustration of a Tuscan capital in his printed edition of Vitruvius (1511), he showed the capital with an egg and dart enrichment that belonged to the Ionic order. The "most rustic" Tuscan order of Serlio was later carefully delineated by Andrea Palladio. From the perspective of these writers, the Tuscan order was an older primitive Italic architectural form, predating the Greek Doric and Ionic, associated by Serlio with the practice of rustication and the architectural practice of Tuscany. Giorgio Vasari made a valid argument for this claim by reference to il Cronaca's graduated rustication on the facade of Palazzo Strozzi, Florence. Like all architectural theory of the Renaissance, precedents for a Tuscan order were sought for in Vitruvius, who does not include it among the three canonic orders, but peripherally, in his discussion of the Etruscan temple (book iv, 7.2-3). Later Roman practice ignored the Tuscan order, and so did Leon Battista Alberti in De re aedificatoria (shortly before 1452).