The Corpus Agrimensorum Romanorum (Corpus of Roman Land Surveyors) is a Roman book on land surveying which collects works by Siculus Flaccus, Frontinus, Agennius Urbicus, Hyginus Gromaticus and other writers, known as the Agrimensores ("land surveyors"). The work is preserved in various manuscripts, of which the oldest is the 6th or 7th-century Codex Arcerianus. Contents and authors The Corpus consists of a number of texts with different contents, composed at different dates. The Codex Arcerianus alone contains 33 separate works, most of which are the writings of the Agrimensores. These writings were clearly written as textbooks or manuals for working land surveyors. The most important authors in the collection are Frontinus (1st century AD), Agennius Urbicus (5th or 6th century), Hyginus Gromaticus, Siculus Flaccus (2nd century), and Marcus Junius Nipsus (2nd century). Another important component of the work are the Libri Coloniarum ("Books of Colonies"), lists of surveyed areas of countryside and cities in Italy between Etruria and Sicily, mostly in southern Italy. Possibly, these were areas that were subject to land surveys, although they had already been occupied under the arcifinalis law (i.e. land survey and distribution at point of conquest). The process is much debated among historians. A third sub-set of works in the corpus are writings which deal with the mathematical and geometric aspects of land surveying. The most important of these are the Expositio et ratio omnium formarum (Explanation and Calculation of All Shapes) by Balbus and a mathematical work by Epaphrodites and Vitruvius Rufus Various other texts are also bundled into the Corpus, including: Extracts from Euclid's Elements Extracts from Columella's De re rustica The Lex Mamila Roscia Peducaea Alliena Fabia, part of a Roman law on setting and protecting land boundaries. In particular, the law imposes a fine of 5,000 sesterces for moving a boundary stone. The date of the law is debated, but it is likely that the law was proposed and passed by Gaius Mamilius Limetanus when he was tribune of the people in 109 BC. Transmission and legacy The Corpus is transmitted in several manuscripts. The oldest of these is the sixth- or seventh-century uncial manuscript known as the Codex Arcerianus or Codex Guelfferbytanus 36.23 Augusteus 2, now held in the Herzog August Bibliothek in Wolfenbüttel. This is one of the few surviving non-literary and non-religious illuminated manuscripts from late antiquity. Like all later manuscripts, this text contains gaps and corrupt