President Donald Trump basked in a British royal spectacle Wednesday, greeted by military honor guards and mounted troops in red and gold as King Charles III's guest at Windsor Castle for the start of a state visit full of pageantry and political risks for the host country.

The day of pageantry was on a scale designed to impress the grandeur-loving president and involved some 120 horses and 1,300 troops, including the largest guard of honor in living memory.

In St George's Chapel, the Trumps were treated to a performance by choristers in the Nave and a guided tour of the 15th-century Quire.

Away from the cameras, President Trump privately laid a wreath at the tomb of Queen Elizabeth II.

Later, the president and Charles toured the Royal Collection Display in an ornate room where officials laid out five tables of artifacts on U.S.-British relations.

“Wow,” Trump said as he looked at documents on U.S. independence.

“That’s fascinating,” Charles said.

Exchanging gifts, Charles and Camilla presented the Trumps with a handbound leather volume celebrating the 250th anniversary of the Declaration of Independence, as well as the Union flag that flew above Buckingham Palace on the day of Trump’s inauguration in January.

The royals also gave first lady Melania Trump a silver and enamel bowl and a personalized handbag by British designer Anya Hindmarch.

Trump gave Charles a replica of a President Dwight Eisenhower sword, and Camilla received a vintage Tiffany & Co. gold, diamond and ruby brooch.