The luxury six-bedroom property in Malta features stables, cellars and servant's quarters.
The oldest ever male member of the British royal family is well-known for his extensive list of gaffes.
Along with Prince Harry, she greeted a crowd gathered outside St Mary Magdalene Church in Sandringham.
The 96-year-old prince, also known as the Duke of Edinburgh, has been at the queen's side throughout her 65 years on the throne.
"There is a profound sense of commitment and seriousness both about their faith and about their lives together."
Markle probably won't end up doing much to improve the rocky race relations in the United Kingdom and will likely be instructed by her royal advisers to hide that she is half black, according to two noted British scholars.
The pair, who married on November 20, 1947, first met when Elizabeth was 13.
Philip met Royal Marines at Buckingham Palace after they took part in tests of strength and endurance to raise funds for charity.
While the moment will bring welcome respite to Philip, it will mean extra work for the younger royals
If changes are not made, the Queen will receive a £2.8 million pay rise.
Color-coordinated royals will celebrate their birthdays this weekend.
Abbott has faced a torrent of criticism in recent weeks over policy decisions, handling of the economy.