The Online Coins of the Roman Empire website appears to be an interesting resource that provides some background information for the Roman world inhabited by the NT authors.
Online Coins of the Roman Empire (OCRE), a joint project of the American Numismatic Society and the Institute for the Study of the Ancient World at New York University, is a revolutionary new tool designed to help in the identification, cataloging, and research of the rich and varied coinage of the Roman Empire. The project records every published type of Roman Imperial Coinage from Augustus in 31 BC, until the death of Zeno in AD 491. This is an easy to use digital corpus, with downloadable catalog entries, incorporating over 43,000 types of coins.
As of November 2016, OCRE provides links to examples present in more than a dozen American and European databases (both archaeological and museum in context), including the ANS collection, the Münzkabinett of the State Museum of Berlin, and the British Museum, now totalling nearly 100,000 physical specimens. Between these collections, OCRE is now able to illustrate 50% of the imperial coin types that it contains. Moving forward, as more collections join the project, it will eventually incorporate and display almost all recorded Roman Imperial coin types. Furthermore, it draws findspot information from another ANS-developed resource, Coin Hoards of the Roman Republic, enabling the mapping of the distribution of early Augustan types. Geographic data are also provided by the Portable Antiquities Scheme, Antike Fundmünzen Europa, OpenContext, and other partners. For more information on project partners, please see the contributors page.
OCRE is made possible by stable numismatic identifiers and linked open data methodologies established by the Nomisma.org project. Coin type data are made available with an Open Database License. All images are copyright of their respective institutions. OCRE is built on the numbering system created by the Roman Imperial Coinage series. For details of the printed volumes of his series please visit Spink & Son (https://www.spinkbooks.com/section.php?xSec=43%26xPage=1).