The images are of the DC skyline above and the "Old City" below. Gold-leaf plaques with the donors' names undulate across a double backdrop of pale porcelain slabs: smooth ones above forming a stylized skyline of Washington that includes the three buildings the congregation has occupied since 1876, and rough ones below suggesting the stone walls of the Old City of Jerusalem.
The text
נתתה שמחה בלבי
You have brought joy to my heart.
Psalm 4:8