He gives some tales about the invention of each of the orders, but he does not give a hard and fast set of canonical rules for the execution of capitals. Two further, specifically Roman orders of architecture have their characteristic capitals, the sturdy and primitive Tuscan capitals, typically used in military buildings, similar to Greek Doric, but with fewer small moldings in its profile, and the invented Composite capitals not even mentioned by Vitruvius, which combined Ionic volutes and Corinthian acanthus capitals, in an order that was otherwise quite similar in proportions to the Corinthian, itself an order that Romans employed much more often than Greeks. The increasing adoption of Composite capitals signalled a trend towards freer, more inventive (and often more coarsely carved) capitals in Late Antiquity. The anta capital is not a capital which is set on top of column, but rather on top of an anta, a structural post integrated to the frontal end of a wall, such as the front of the side wall of a temple. The top of an anta is often highly decorated, usually with bands of floral motifs. The designs often respond to an order of columns, but usually with a different set of design principles. In order not to protrude excessively from the wall surface, these structures tend to have a rather flat surface, forming brick-shaped capitals, called "anta capitals". Anta capitals are known from the time of the Doric order. An anta capital can sometimes be qualified as a "sofa" capital or a "sofa anta capital" when the sides of the capital broaden upward, in a shape reminiscent of a couch or sofa. Anta capitals are sometimes hard to distinguish from pilaster capitals, which are rather decorative, and do not have the same structural role as anta capitals. The origins of the Tuscan order lie with the Etruscans and are found on their tombs. Although the Romans perceived it as especially Italianate, the Tuscan capital found on Roman monuments is in fact closer to the Greek Doric order than to Etruscan examples, its capital being nearby identical with the Doric. The Romans invented the Composite order by uniting the Corinthian order with the Ionic capital, possibly as early as Augustus's reign. In many versions the Composite order volutes are larger, however, and there is generally some ornament placed centrally between the volutes. Despite this origin, very many Composite capitals in fact treat the two volutes as different elements, each springing from one side of their leafy base.