It will be released on American network PBS on January 13 - to the consternation of UK fans, who have complained that a broadcast date for the quintessentially British period drama has not yet been confirmed. Filming took place at several Yorkshire locations in the summer of 2018, and other buildings that have appeared in the previous two series are expected to feature again. Interior shots are filmed at Church Fenton Studios, a converted aircraft hangar between Selby and York.
Hull's Old Town is famed for its Georgian and Victorian mercantile architecture, including Wilberforce House. High Street is the oldest thoroughfare in the city. Another ITV period drama, Dark Angel, was also filmed here.
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The English Heritage-run stately home in Doncaster is thought to have been chosen because of the quality and authenticity of its Victorian gardens. The Grade I-listed mansion was built in 1861.
The ancestral seat of the earls of Harewood, who are still resident in the house, has been used to stand in for Buckingham Palace since the first series and is expected to appear again as Queen Victoria's home.
The Grade I-listed building is a medieval guildhall built in 1357, and it is the largest timber-framed building in the country still used for its original purpose. The Company of Merchant Adventurers still own the hall and it is open as a museum.
Castle Howard has been used as Kensington Palace, another royal residence, since the first series. It's most famous for its appearance in Brideshead Revisited.
The house and estate near Wetherby are still family-owned. Bramham appears as a royal residence
England's 'forgotten' stately home near Rotherham actually has a facade longer than Buckingham Palace's - so it's no surprise it was chosen to appear as a royal residence. Currently undergoing a major restoration.
This Victorian gothic house near Selby is the Yorkshire seat of the Dukes of Norfolk, and occupied by the current Duke's brother. It appears as Windsor Castle in Victoria.
The Minster is used to stand in for Westminster Abbey.
Another Victorian gothic house, this time near Harrogate, that appears in previous series.
This Georgian country house near Ripon, which is still family-owned, is a regular on our screens - it recently appeared in Peaky Blinders.
The estate near Helmsley in the North York Moors is the seat of the Barons Feversham, and they still own the house.
The Yorkshire coast has appeared in previous series.