Several past residents of the White House came together to honor former first lady Barbara Bush on Saturday, and gathered for a photo shared by the office of former President George H.W. Bush on Sunday.

Former Presidents Obama and Clinton attended the service in Houston with former first ladies Michelle ObamaMichelle LeVaughn Robinson ObamaMichelle Obama to headline Essence Festival Obama shares tribute to Michelle to celebrate Mother's Day 111-year-old woman gets free tickets to see Michelle Obama book tour MORE and Hillary ClintonHillary Diane Rodham ClintonFrustration boils over with Senate's 'legislative graveyard' Poll: Nearly half of Clinton's former supporters back Biden Harris readies a Phase 2 as she seeks to rejuvenate campaign MORE. They joined members of the Bush family, including former Presidents George H.W. and George W. Bush and former first lady Laura Bush.

Noticeably absent from the group was President TrumpDonald John TrumpNASA exec leading moon mission quits weeks after appointment The Hill's Morning Report — After contentious week, Trump heads for Japan Frustration boils over with Senate's 'legislative graveyard' MORE, who said Saturday that he would watch the funeral services from his Mar-a-Lago resort in Palm Beach, Fla.

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It’s not uncommon for sitting presidents not to attend the funerals of former first ladies.

The White House said the president would skip the funeral "to avoid disruptions due to added security, and out of respect for the Bush Family and friends attending the service."

Melania TrumpMelania TrumpThe Hill's Morning Report — After contentious week, Trump heads for Japan Trump makes unannounced visit to Arlington cemetery Trump family members will join state visit to UK MORE brought two White House staff members who were close to the Bush family as her guests to the funeral.

Trump was accompanied by former White House head maitre d' George Hainey and current White House usher Buddy CarterEarl (Buddy) Leroy CarterThirty-four GOP members buck Trump on disaster bill Federal board votes to rename Georgia's 'Runaway Negro Creek' to 'Freedom Creek' 3 signs the PBMs are desperately in need of reform MORE, the first lady’s office said.

Barbara Bush died Tuesday night at age 92.