Millions of Christians around the world are celebrating Easter this Sunday, commemorating the day when according to Christian tradition Jesus was resurrected in Jerusalem two millennia ago. Here's a look at photos of these celebrations all across the globe, from Bosnia to Boulder.

St. Peter's Square during Pope Francis' Easter Mass at the Vatican.

Queen Elizabeth II and Prince Phillip attend Easter Matins in England.

Easter mass at Baghdad's Our Lady of Flowers Catholic Churc in Iraq.

The Russian Premier and President attend Easter services in Christ the Savior Cathedral in Moscow.