The documentary series returns and heads to Sotheby's, where JMW Turner's Rome, From Mount Aventine is expected to sell for upwards of £20million.

In Geneva, Christie's is auctioning the precious gems of Princess Eugenie. Meanwhile, in London, Sotheby's has a rare miniature portrait of the composer Mozart.

In Geneva, Sotheby's is selling the 1925 Henry Graves Supercomplication - the world's most complicated handmade watch - and it is expected to fetch over £10million.