Babka, also known as Kulich, is a sweet yeast cake.
  
Babka is a spongy, brioche-like yeast cake made mainly in Central and
  Eastern Europe. It is traditionally baked for Easter Sunday in Poland,
  Lithuania, Bulgaria, Macedonia, and Albania, and for the major holidays
  (Christmas, Easter, New Year, Pentecost) in Romania.
  
  Another version of Babka is associated with the Eastern European Jewish
  tradition. This babka is made from a doubled and twisted length of yeast
  dough and is typically baked in a high loaf pan.