Ceremonies are underway to honor former President George H.W. Bush , the 41st U.S. president, who died Friday at the age of 94.

Bush’s casket was flown from Houston to Washington, D.C., early Monday, and his body will lie in state until Wednesday.

A memorial service for friends and family members will be held Wednesday at Washington National Cathedral. The commemorations conclude Thursday, when the casket will be flown back to Houston for a service at St. Martin’s Episcopal Church and buried at Bush’s presidential library in College Station. He will be laid to rest next to his wife, Barbara Bush, who died in April.