Map of Testaccio showing the approximate locations of Emporium, Porticus Aemelia and Horrea Galbae acc. to the fragment 21a/c of the <a href="https://en.wikipedia.org/wiki/Forma_Urbis_Romae" class="extiw" title="en:Forma Urbis Romae">Forma Urbis Romae</a> (created between 203 and 211 AC). The fragment survived only as a drawing in <i>Codex Vaticanus Latinus 3439,</i> f. 13-23 from the 16th century. Positioning of the fragment on the modern map acc to A. Aguilera Martín: <i>El monte Testaccio y la llanura subaventina. Topografía extra portam Trigeminam.</i> Consejo Superior de Investigaciones Científicas, Madrid 2002, <a href="//commons.wikimedia.org/wiki/Special:BookSources/9788400080396" title="Special:BookSources/9788400080396">ISBN 9788400080396</a>, p. 54, fig. 7.
<a href="//commons.wikimedia.org/wiki/User:0000ff" title="User:0000ff">0000ff</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>, base map from OpenStreetMap and OpenStreetMap Foundation