In the archaeological excavations that were conducted at the site in 2003-2005, on behalf of the Antiquities Authority and under the direction of Yotam Tepper, remains of a large settlement were revealed – buildings, courtyards and alleys – in which there are plastered water cisterns and numerous installations that were used to store oil, wine and agricultural produce. Ritual baths and other finds that were discovered there indicate this was a Jewish settlement. In the western part of the Megiddo Prison compound a large building was exposed in which there is a mosaic floor of a Christian prayer hall. Depicted in the mosaic are geometric patterns, a medallion with fish and three ancient Greek inscriptions: an inscription mentioning a Roman army office who contributed for the construction of the mosaic (see the margin of the souvenir sheet); an inscription honoring the memory of four women and an inscription that mentions a woman who dedicated a table (altar) to the memory of the Lord Jesus Christos. The fish that adorned the mosaic floor were an early Christian symbol, and it is known that the Christians ascribed an acronym to the Greek word for fish meaning "Jesus Christ Son of God, the Savior”.
The combination of the three inscriptions in the mosaic from the third century, which link a Roman army officer with Christianity in a prayer hall, is a unique and rare find. It precedes the proclamation of Christianity as a recognized and official religion and is therefore extremely important in understanding Christianity in this period, in studying the Roman army in the eastern empire and in matters relating to the presence of a Christian community existing along side a mixed Jewish- Samaritan settlement.
The site at Megiddo was uncovered during extensive salvage excavations that the Antiquities Authority conducted at the request of the Israel Prison Service and the Israel Defense Forces. As part of a prisoner rehabilitation project approximately 100 Jewish, Muslim, Christian and Druze prisoners serving their sentences in Megiddo and Tsalmon Prisons participated in the excavation.
On the first day cover is the symbol of the Israel Antiquities Authority and the tools used in archaeological excavations, against the background of another portion of the mosaic. The sheet was designed by Yitzhak Granot and costs 15 NIS.