Prince Charles, the Prince of Wales
On the 1st of July 1969, Charles Phillip Arthur George was officially invested as the Prince of Wales, a title which is traditionally given to the eldest son of the reigning monarch of the United Kingdom.
In actual fact he had been Prince of Wales since 1958 but this ceremony was a way of 'rubber-stamping' it in the eyes the world.
The venue for the investiture was the iconic Caernarfon Castle (pictured above). But why out of all the Welsh castles was this one chosen in particular? The answer is because the first ever English Prince of Wales (Edward II) was born in this very castle and so made Caernarfon Castle an appropriate and clear choice of venue.
Apparently the next series of 'The Crown' will feature the reign of Elizabeth II and will include the investiture; watch this space!