History came knocking at 600 I St. NW, and innovation greeted her at the door. Step inside the non-denominational, non-membership, non-traditional Sixth & I Historic Synagogue—a building dating back to 1908—and you’ll find yourself at the threshold of fluid Jewish culture. At Sixth & I, what it means to be Jewish is up to you. Sixth & I is a congregation without borders where the lines of devotion blur to create a spiritual fusion of fresh rituals.