Prince Philip, who on Wednesday made his final solo public appearance before retiring from his official duties as the consort of Queen Elizabeth II, recently quipped that he was “the world’s most experienced plaque-unveiler.”

He could be forgiven for finally taking a break.

He is, after all, 96. He and the queen plan to celebrate their 70th wedding anniversary in November. Since she ascended the throne in 1952, according to Buckingham Palace, he has had 22,219 solo engagements, given 5,496 speeches, and written 14 books — among them “Competition Carriage Driving.”

A native of Greece, Prince Philip courted the then-Princess Elizabeth during his time in the Royal Navy, a part of history that has captivated a new generation of Britons via the Netflix series “The Crown.” Their seven-decade marriage has seen Britain through postwar austerity, the creation of a welfare state, the loss of empire, entry into what became the European Union and, now, plans to exit it.