Jericho synagogue - Credit: Wikimedia Commons
The Jericho synagogue dates to the late 6th or early 7th century CE and was discovered in Jericho in 1936. All that remains from the ancient prayer house is its mosaic floor, which contains an Aramaic inscription presenting thanks to the synagogue donors, and a well-preserved central medallion with the inscription "Shalom al Israel", meaning "Peace [up]on Israel". This led to the site also being known as Shalom Al Israel Synagogue. Read more on Wikipedia
Source: en.wikipedia.org