The room known as the Holy of Holies was the innermost and most sacred area of the ancient tabernacle of Moses and temple of Jerusalem. The Holy of Holies was constructed as a perfect cube. It contained only the Ark of the Covenant, the symbol of Israel’s special relationship with God. The Holy of Holies was accessible only to the Israelite high priest. Once a year, on Yom Kippur, the Day of Atonement, the high priest was permitted to enter the small, windowless enclosure to burn incense and sprinkle the blood of a sacrificial animal on the mercy seat of the Ark. By doing so, the high priest atoned for his own sins and those of the people. The Holy of Holies was separated from the rest of the tabernacle/temple by the veil, a huge, heavy drape made of fine linen and blue, purple and scarlet yarn and embroidered with gold cherubim.