The production team chose Winchester Cathedral in Hampshire, England to recreate the historic ceremony due to it being one of Europe's largest cathedrals.
The cultural hotspot sits just outside of the capital and is the famous resting place of Jane Austen. Interestingly, it's not the first time the building has graced the small screen having featured in high-profile productions such as The Da Vinci Code and Les Misérables.
It's also steeped in regal history having played host to several weddings from Henry IV to Queen Mary Tudor.
Hylands House
The second episode of season three titled 'Margaretology' is entirely dedicated to Princess Margaret and then-husband Lord Snowdon's history-making trip to the White House.
After years of feeling lost in her regal role, the Queen's younger sister jumped at the opportunity to flock across the pond to help rebuild Anglo-American relations.
Although much of the storyline bowed down to creative license, the royal dazzled under the spotlight with scenes depicting her dancing with President Lyndon B. Johnson in 1965 and schmoozing powerful faces at dinner.
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But the glamorous episode wasn't actually filmed in the US, as the crew headed to Essex in South England for shooting with Neoclassical building Hylands House taking on the role of the White House.
Open to the public on select days, guests can enjoy free guided tours and peruse the Victorian gardens fit for a Queen.
Caernarforn Castle
When it came to recreating Prince Charles' famous investiture ceremony, the 1969 event translated smoothly onto the small screen.
In a seamless move, the episode in question was filmed in the real-life location of Caernarforn Castle in Gwynedd in north west Wales.
Built between 1238 and 1330 by Edward I, the historic building is a UNESCO World Heritage Site and can be visited by the public all year round.
Belvoir Castle
Belvoir Castle in Leicestershire, England takes on the role of Windsor Castle in both seasons one and two.
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The impressive 11th century estate is home to the 11th Duke and Duchess of Rutland and has featured heavily on screen in the likes of The Da Vinci Code and Victoria & Abdul.
In order to do the Queen's residence justice, cast and crew filmed in a number of locations - one of which included Wilton House in Salisbury, England.
Built on the site of a ninth century nunnery, the residence is home to the 18th Earl and Countess of Pembroke with 21 acres of rolling parkland and majestic interiors.
