According to Halachot Brit Milah (Shulchan Aruch, Yorah Deah, 265) it is customary to designate a chair for Eliyahu Hanavi.
Kisseh Eliyahu, an integral part of the Jewish family’s circumcision ceremony, has evolved into an essential element in every synagogue. Frequent use (particularly in younger communities) during circumcision ceremonies, coupled with its elegant appearance, has elevated its significance within the religious community, solidifying its status as a prominent and central display item.