Kolach or kalach is a traditional bread found in Central and Eastern European cuisines, commonly served during various special occasions – particularly wedding celebrations, Christmas, Easter, and Dożynki. The name originates from the Old Slavonic word kolo (коло) meaning "circle" or "wheel". Korovai is sometimes categorised as a type of kolach.

Challah is a special bread of Ashkenazi Jewish origin, usually braided and typically eaten on ceremonial occasions such as Shabbat and major Jewish holidays. Ritually acceptable challah is made of dough from which a small portion has been set aside as an offering. Challah may also refer to the dough offering. The word is biblical in origin, meaning "loaf". Similar braided breads such as kalach and vánočka are found across Central and Eastern Europe.