What is the significance of a kippah / yarmulke?

Response

The kippah (plural: kippot) or yarmulke/yamaka (Yiddish) is a skullcap, a small, round head covering worn by Jews—mostly men. The kippah was first mentioned in the 24-chapter Tractate Shabbat, one of 12 books in the Moed Order—the section of the Mishnah on festivals. The book focuses on activities forbidden on the Sabbath, such as discussing business and carrying items. The exact origin and purpose of the yarmulke is unclear, but it is used as a symbol of respect to God: the wearer of the kippah acknowledges that God is above him. Some Jewish teachers insist that men cover their heads during prayer “For a man indeed ought not to cover his head, forasmuch as he is the image and glory of God: but the woman is the glory of the man.”, (which apparently contradicts the beliefs in Jesus’ time, according to 1 Corinthians 11:7) and other religious studies. Some believe a yarmulke must be worn at all times, even while sleeping. Others suggest that wearing a kippah is an exceptional act of piety and is not mandatory for the general public. In certain Reform and Conservative Jewish circles, women also wear yarmulkes.

Today, the style of yarmulke can also indicate the wearer’s sect and political inclinations. Ultra-Orthodox Jews wear large, black yarmulkes made of velvet. More contemporary Jews prefer lighter colors. Black silk yarmulkes are worn by those who are less devout or by non-Jews who want to respect customs when visiting a synagogue. Zionists often opt for crocheted or knitted yarmulkes. A hat can be worn on top of the yarmulke as an additional layer or instead of a yarmulke when displaying one’s Jewish heritage may not be appropriate. Conversely, some yarmulkes are designed in sports team colors or featuring cartoon characters. A well-known story recounts how a Navy Rabbi used his yarmulke to wipe the blood from victims of the Beirut barracks.

During a bombing in 1983, a fellow chaplain, a Catholic priest, tore off a piece of his uniform to create a makeshift yarmulke.

Yarmulkes are not referenced in the Bible, and wearing a kippah is not mandated in the Mosaic Law. Yarmulkes were not mentioned until about 200 years after the time of Jesus, in the Mishnah (the extra-biblical teachings that provided unnecessary details on how to follow the Law). They did not become prevalent until the Middle Ages. Kippot are obviously not obligatory for Christians, but it would be courteous to wear one when visiting a synagogue or participating in a Jewish ceremony.