Paul W. Jacobs, II is an independent scholar who focuses on ancient Rome and its topographical development. A graduate of Harvard University and the University of Virginia Law School, and a litigator by training, Jacobs has practiced and published in the area of voting rights, where knowledge of demographics, mapmaking and geography is essential. He has spent extensive time in Rome and has been fascinated with the ancient city and its development for decades. Diane Atnally Conlin is Associate Professor of Classics at the University of Colorado, Boulder. She is author of the award-winning The Artists of the Ara Pacis (1997) and is co-director of the University of Colorado and Comune di Roma excavations at the Villa of Maxentius in Rome. She specializes in the production and style of Roman relief sculpture. In addition to her art historical and archaeological research, Conlin has won numerous teaching awards, including a lifetime appointment as a President's Teaching Scholar.

• 1. 'The size of the plain is remarkable': defining the limits of the Campus Martius in time and space; 2. Gathering troops in the war god's field; 3. 'Very costly temples': the Campus Martius and republican temple construction; 4. 'Chariot races', 'three theatres', 'an amphitheatre' and more: entertainment in the Campus Martius; 5. 'Colonnades about it in very great numbers': the porticoes of the Campus Martius; 6. Between the Aqua Virgo and the Tiber: water and the Field of Mars; 7. 'A zeal for buildings': reshaping of the space by the emperors; 8. Conclusion: 'the rest of the city a mere accessory'; Appendix A: chronology of development in the Campus Martius to the early fourth century CE; Appendix B: glossary of architectural terms.

'Campus Martius by Paul W. Jacobs, II and Diane Atnally Conlin expertly reveals how the ancients transformed this expansive plain outside Rome into an architectural showcase. Strabo said the region 'affords a spectacle that one can hardly draw away from'; the same could be said of this well-written, engaging book.' Diane Favro, University of California, Los Angeles

Paul W. Jacobs, II is an independent scholar who focuses on ancient Rome and its topographical development. A graduate of Harvard University and the University of Virginia Law School, and a litigator by training, Jacobs has practiced and published in the area of voting rights, where knowledge of demographics, mapmaking and geography is essential. He has spent extensive time in Rome and has been fascinated with the ancient city and its development for decades. Diane Atnally Conlin is Associate Professor of Classics at the University of Colorado, Boulder. She is author of the award-winning The Artists of the Ara Pacis (1997) and is co-director of the University of Colorado and Comune di Roma excavations at the Villa of Maxentius in Rome. She specializes in the production and style of Roman relief sculpture. In addition to her art historical and archaeological research, Conlin has won numerous teaching awards, including a lifetime appointment as a President's Teaching Scholar.

• 1. 'The size of the plain is remarkable': defining the limits of the Campus Martius in time and space; 2. Gathering troops in the war god's field; 3. 'Very costly temples': the Campus Martius and republican temple construction; 4. 'Chariot races', 'three theatres', 'an amphitheatre' and more: entertainment in the Campus Martius; 5. 'Colonnades about it in very great numbers': the porticoes of the Campus Martius; 6. Between the Aqua Virgo and the Tiber: water and the Field of Mars; 7. 'A zeal for buildings': reshaping of the space by the emperors; 8. Conclusion: 'the rest of the city a mere accessory'; Appendix A: chronology of development in the Campus Martius to the early fourth century CE; Appendix B: glossary of architectural terms.

'Campus Martius by Paul W. Jacobs, II and Diane Atnally Conlin expertly reveals how the ancients transformed this expansive plain outside Rome into an architectural showcase. Strabo said the region 'affords a spectacle that one can hardly draw away from'; the same could be said of this well-written, engaging book.' Diane Favro, University of California, Los Angeles

Paul W. Jacobs, II is an independent scholar who focuses on ancient Rome and its topographical development. A graduate of Harvard University and the University of Virginia Law School, and a litigator by training, Jacobs has practiced and published in the area of voting rights, where knowledge of demographics, mapmaking and geography is essential. He has spent extensive time in Rome and has been fascinated with the ancient city and its development for decades. Diane Atnally Conlin is Associate Professor of Classics at the University of Colorado, Boulder. She is author of the award-winning The Artists of the Ara Pacis (1997) and is co-director of the University of Colorado and Comune di Roma excavations at the Villa of Maxentius in Rome. She specializes in the production and style of Roman relief sculpture. In addition to her art historical and archaeological research, Conlin has won numerous teaching awards, including a lifetime appointment as a President's Teaching Scholar.

• 1. 'The size of the plain is remarkable': defining the limits of the Campus Martius in time and space; 2. Gathering troops in the war god's field; 3. 'Very costly temples': the Campus Martius and republican temple construction; 4. 'Chariot races', 'three theatres', 'an amphitheatre' and more: entertainment in the Campus Martius; 5. 'Colonnades about it in very great numbers': the porticoes of the Campus Martius; 6. Between the Aqua Virgo and the Tiber: water and the Field of Mars; 7. 'A zeal for buildings': reshaping of the space by the emperors; 8. Conclusion: 'the rest of the city a mere accessory'; Appendix A: chronology of development in the Campus Martius to the early fourth century CE; Appendix B: glossary of architectural terms.

'Campus Martius by Paul W. Jacobs, II and Diane Atnally Conlin expertly reveals how the ancients transformed this expansive plain outside Rome into an architectural showcase. Strabo said the region 'affords a spectacle that one can hardly draw away from'; the same could be said of this well-written, engaging book.' Diane Favro, University of California, Los Angeles