The so-called Downton Abbey tiara dates back to the 1800s and is pavé set with 45ct of old-cut diamonds. Currently for sale at Bentley & Skinner, it was originally given to Princess Louise on her wedding day in 1889 and, more recently, was worn by Lady Ma

The so-called Downton Abbey tiara dates back to the 1800s and is pavé set with 45ct of old-cut diamonds. Currently for sale at Bentley & Skinner, it was originally given to Princess Louise on her wedding day in 1889 and, more recently, was worn by Lady Mary Crawley, played by Michelle Dockery, in the hugely popular TV drama.