Portrait of Catharina Hooghsaet (1607–1685) is a painting by the Dutch Golden Age painter Rembrandt, painted in 1657 and in 2014 was lent to the National Gallery for an exhibition on Rembrandt's late works that in 2015 travelled to the Rijksmuseum. It was the property of Penrhyn Castle at the time and was sold shortly thereafter. The painting was to be sold to a private collector outside the UK for € 35 million in September 2015 but had not received an export license yet in October.