If only because of the enormous quantities produced, Dutch Golden Age painting has always formed a significant part of collections of Old Master paintings, itself a term invented in the 18th century to describe Dutch Golden Age artists. Taking only Wouwerman paintings in old royal collections, there are more than 60 in Dresden and over 50 in the Hermitage. But the reputation of the period has shown many changes and shifts of emphasis. One nearly constant factor has been admiration for Rembrandt, especially since the Romantic period. Other artists have shown drastic shifts in critical fortune and market price; at the end of the period some of the active Leiden fijnschilders had enormous reputations, but since the mid-19th century realist works in various genres have been far more appreciated.