The rectangular building, measuring about 70 feet by 20 feet, was composed of two rooms, each about 650 square feet, the Oleg Deripaska's Volnoe Delo Foundation said. It was destroyed in the middle of the sixth century when tribes attacked and burned down the city. The synagogue also offers experts insight into Judaism practice during the religion's "Second Temple Period," experts with the foundation said. From 516 B.C. until 70 A.D., most Jewish rituals took place at the second Jerusalem Temple, so it was rare for synagogues to be built elsewhere. Kuban is in southeast Russia, bordering the Black Sea.