Where was The Diplomat filmed? Locations featured in the hit series, including the stunning Italian season 4 spots

Netflix's hit thriller The Diplomat, is back for season 4 and we couldn't be more excited. After the potentially catastrophic secret that was revealed at the end of season 3, Kate Wyler will face some of her biggest challenges so far, as the UK and US come closer to going to war than ever before.

While viewers are hooked on the political drama in the show, there's something else about it that always gets viewers talking - the scenery.

The backdrops are incredibly important to world building and creating the right atmosphere, and there's some stunning ones in The Diplomat.

As season 4 takes viewers on a trip to Italy as the character attend the G7 Summit, we break down the key locations in the series, and where they can be found in real life.

Where was The Diplomat filmed?

Season 4 of The Diplomat sees Kate, Hal, Grace and Todd diverted to Windsor Castle when their plan can't take off because of a protest.

It's not the real Windsor Castle that viewers will see in the series, with a total of nine total locations across the US and UK used to recreate the royal residence. 

In New York, scenes depicting President Grace Penn’s office and the ladies toilets, were filmed at Sleepy Hollow Country Club in Scarborough-on-Hudson. The Woolworth Estate in Glen Cove in New York stood in for the Equerries Room used by staff during episode 2.

St. Josaphat’s Monastery was used instead of the Royal Library, and the panic room you can see was actually part of the Church of the Intercession in New York City.  

According to Tudum, UK locations used to stand in for Windsor Castle include the actual Cathedral of the Incarnation at St. George’s Chapel at Windsor, while Hal’s office scenes were shot at Belvoir Castle in Leicestershire.

Lancaster House, the British Foreign Office and Burghley House were also used to re-create the iconic castle.

Where was the G7 Summit filmed in Italy?

Kate, Hal, Grace, Todd, Eidra, Stuart, and Billie all head off to Italy during season 4, for the G7 Summit.

These scenes were filmed in Tuscany, and the scene in the greenhouse, and those showing the president and vice president walking and talking, were filmed at Viesca Toscana estate in the Florentine countryside.

A conversation between Stuart and Billie next to the pool, was filmed at the Dimora Ghirlandaio estate near Florence.

For the G7 Summit itself, exterior shots were filmed in Lucca, and some interior scenes were shot at Villa Reale di Marlia.

Medici Villa, Poggio a Caiano, was also used for some exterior scenes, while the Villa de Medicea La Petraia was used as the location for the G7 Octagon Room.

During previous seasons several locations have made return appearances to the show, and are part of The Diplomat cast as much as the actors - look out for their cameos for season 4.

Viewers have previously spotted well known London locations, including Carlton Gardens in St James, and Greenwich's Old Royal Naval College in the series.

Carlton Gardens is a cul-de-sac sitting at the west end of Carlton House Terrace, and was built slightly after the latter. Originally made up of seven large houses, some have now been converted to offices, while others remain luxury residences.

The Old Royal Naval College appears often in the series, standing in for the outside of government buildings. It's no stranger to being featured on screen, having previously appeared in Skyfall, The King's Speech, The Crown and Bridgerton, among many more.

Famous London landmarks Trafalgar Square and Regent's Park can also be seen during The Diplomat. The US embassy in London also makes an appearance during the season 3 outing.

For scenes featuring the office of Foreign Secretary Austin Dennison, the show filmed at One Great George Street, Westminster’s corporate conference and events venue.

Excitingly, the series also filmed both interior and exterior shots of the real Foreign Office. "That is a genuine part of the Westminster controlled environment, so [it was] very exciting to be given access," location manager E.J. Richards tells Netflix Tudum.

For scenes depicting 10 Downing Street, the crew were not permitted to use the real location. Interior scenes were filmed at Harefield House in the London borough of Hillingdon - the crew were even allowed to paint the walls here, to recreate Downing Street as it really appears.

Exterior shots for 10 Downing Street were filmed at Elstree Studios in Borehamwood, where the iconic street was built as a set.

Is Winfield House a real place?

In the show and real life, the diplomatic residence for the US ambassador is Winfield House in Regent's Park. However, the real Winfield House isn't used for filming, with Wrotham Park in Hertfordshire being used instead.

Found in the South Mimms area of the county, Wrotham Park is a Palladian Mansion set in a 2,500 acre estate. It was designed by Isaac Ware in 1754 and built by Admiral John Byng, the fourth son of Admiral Sir George Byng.

Where is The Diplomat season 3 filmed in the US?

When previous filming has taken place in the US, the Coe Hall Historic House Museum in Upper Brookville stood in for Prime Minister Trowbridge's home. The museum is part of the larger Planting Fields Arboretum State Historic Park and features a 65-room Tudor Revival mansion.

"One of our greatest achievements of Season 3 was discovering and gaining access to film at Coe Hall Historic House," location director Rob Coleman told Tudum - the mansion had previously allowed very little filming to take place there.

The museum closed for two months while filming took place. "It was one of the only homes we scouted because we all knew early on that it was the right fit," Coleman adds.

If you want to know where to find The Penn mansion from season 3, it's actually the Seacroft Estate on Centre Island, New York (Long Island). Owned by the same family for five generations, Coleman reveals shooting there was "an amazing filming experience."

For Season 3, all interior Washington DC locations were filmed in New York City, mainly at the DeSeverky Mansion in Old Westbury, New York (Long Island). Some scenes were also filmed at the library at the Lotus Club in Manhattan because of the appropriate federalist architecture.

While the majority of season 3 filmed on location in London, production eventually moved to New York to allow Keri Russell and Debora Cahn to balance the shoot schedule with their families.

Speaking to WWD, Keri says, "She [Debora] had always pitched the show to me as starting in London and then being able to come home. And what we did is just moved anything that shot inside a stage back to New York so that our children didn’t forget who we were."

Of filming in the UK capital in the future, the actress adds, "We still plan on going back to London, and we both love London so much, so we still plan on going back and we still plan on having location porn. It’s the fantasy of the show."

All three seasons of The Diplomat are currently available to watch on Netflix.