Beitzah – A roasted egg, symbolizing the korban chagigah (festival sacrifice) that was offered at the Temple in Jerusalem, is then roasted and eaten as part of the meal on Seder night. Although both the Pesach sacrifice and the chagigah were meat offerings, the chagigah is commemorated by an egg, a symbol of mourning (as eggs are the first thing served to mourners after a funeral), evoking the idea of mourning over the destruction of the Temple and the inability to offer the biblically mandated sacrifices for the Pesach holiday. The use of an egg in the seder is first attested in the 16th-century Shulchan Aruch commentary of Rabbi Moses Isserles, and it is not known when the custom began.[3] It is not used during the formal part of the seder.