A wide range of commemorative coins are being struck - from the rare kilo coin to the £5 silver which will be more readily available.
The two arrived late after their helicopter was forced to make an emergency landing minutes after taking off from central London.
Tributes have been paid to Princess Lilian, both in Scandinavia and in Swansea where she was born, after her death at the age of 97.
There's been a royal in our midst today, as Prince Edward visited Blaenau Gwent . He was there to officially open the Diamond Jubilee Square in Abertillery - part of the wider regeneration of the town.
It's just one of the examples of how money from Europe is being invested here, as Megan Boot reports.
The prince has arrived in Abertillery http://t.co/veSzEzq5C2
Prince Edward is visiting Abertillery to see the regeneration of St Michael's Church - which forms part of a £10m improvement project in the town.
With children from Queen Street school happy to give a welsh welcome http://t.co/kKF4yVOG3m
A South Wales Royal Navy commanding officer has brought his own ship to Cardiff for a visit.
A 133-metre long warship is at Brittania Quay in Cardiff until Sunday.
Andrew Block from Crickhowell will welcome invited guest aboard all weekend and today the public will have their chance to have a look around.
Prince Charles has unveiled a plaque at the restored and renamed Redhouse Town Hall in Merthyr Tydfil.
He told onlookers he is "very impressed" with the building.
One lady in Merthyr asked Prince Charles for a "selfie" with her but he said it would ruin her reputation! http://t.co/9APRGwKihf
The Prince's visit has seen him visit some of Wales' most historic buildings and meet people from communities in Pembrokeshire, Carmarthenshire and Merthyr Tydfil.
The Prince of Wales has arrived in Merthyr Tydfil as part of his St David's Day visit to Wales.
Earlier today, he visited Llanelly House in Llanelli.
The Prince of Wales's nose proved an irresistible attraction to a toddler whose parents endured watching their home burn to the ground during the Tottenham riots.
Charles returned to the scene of the major disturbance to learn how the area is recovering.
The heir to the throne shared a lighter moment with husband and wife Mehmet and Burcin Akbasak - who lost their home when rioters set fire to the Carpetright building and flats above.
The dramatic pictures of the Tottenham landmark glowing red hot became a iconic image of the August 2011 riots.
In the shadow of the rebuilt building, Charles sympathised with Mr Akbasak and his wife - who are originally from Turkey - as the couple held their twin daughters Kayla and Lara aged 12 months.
Kayla reached out and made a grab for the prince's nose and he leant forward and happily let the toddler play with his face.Mr Akbasak, 33, said: "Both my daughters are friendly but Kayla was quite interested in the prince and they shared a nice moment."
Prince Charles has met with residents affected by the fierce flooding in Somerset.
The prince made his visit during a sunny spell, although another wave of bad weather is expected to hit the region between 3-pm today and 11pm tomorrow, according to Met Office forecasters.
The Prince will also talk to residents, farmers and business owners in Muchelney.
Prince Charles has been transported by boat to the cut-off village of Muchelney in Somerset.
The prince was then given a tour of the area on the back of a tractor, to see for himself what locals have had to deal with in the flood-hit region.
The Prince of Wales was meeting residents, farmers and business owners in his tour of Somerset.