Q. I'm looking for illustrations of archaeological sites and objects related to the New Testament.

There are many ways to find images related to New Testament archaeology.   The "New Testament and Archaeological Slides from Harvard Divinity School" collection is one source.  The images and descriptions are available in VIA, Harvard's online catalog of visual images.

New Testament and Archaeological Slides from Harvard Divinity School is a collection of over 8,000 digital images for teaching and research in New Testament studies, Greek and Roman mystery religions, and early Christian history. The images are from photographic slides taken or collected by Professor Helmut Koester and his students during more than 30 years of travel to archaeological sites and museums in the Mediterranean area. The sites, which include Athens, Rome, Corinth, Ephesus, Sardis, Thessaloniki, Hierapolis, and Philippi, represent the most important cities and religious centers during the Hellenistic and Roman Imperial periods (ca. 300 BCE to 300 CE). The majority of the images document the architecture and layout of these sites, but there are also relevant images of inscriptions, statues, coins, and mosaics. These last picture the gods and rulers of the ancient world and help illustrate the overlapping iconography of divinity and kingship.

The digitization and cataloging of these images was supported by a grant from the Harvard University Library's Library Digital Initiative (LDI), and the work was carried out as a joint project of Harvard Divinity School's Office of Information Technology and Media Services and Andover-Harvard Theological Library.

To search through all the images from this collection, go to VIA and use the keyword search phrase "Research Team for New Testament and Archaeology" (include the double quotation marks).