Prince Philip has been taken to a Scottish hospital as a "precautionary measure," Buckingham Palace announced August 14.

The British royal, 91, was taken to Aberdeen Royal Infirmary. In June, he was hospitalized for five days with a bladder infection, causing him to miss out on Queen Elizabeth II's final Diamond Jubilee celebrations.

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In recent weeks, Prince Philip appeared to be in good health; he joined his wife at the opening ceremony of the Olympics July 27, and carried out several royal engagements on the Isle of Wight August 13.

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In December 2011, Prince Philip spent four nights in the hospital after suffering chest pains; He underwent a successful coronary stent procedure. Prince Philip, also known as the Duke of Edinburgh, was first hospitalized for chest pains in April 2008.

Philip, a former naval officer, married Queen Elizabeth II in 1947. They have four children together: Prince Charles, 63, Princess Anne, 62, Prince Andrew, 52, and Prince Edward, 48.

This article originally appeared on Prince Philip Taken to Hospital as "Precautionary Measure"