Wallace Collection of the wealthiest families in Europe. They owned large properties in England, Wales and Ireland, and increased their wealth through successful marriages. Politically of lesser importance, the 3rd and 4th Marquess and Sir Richard Wallace became leading art collectors of their time. The Wallace Collection, comprising about 5,500 works of art, was bequeathed to the British nation by Lady Wallace in 1897. The state then decided to buy Hertford House to display the collection and it was opened as a museum in 1900. As a museum the Wallace Collection's main strength is perhaps its extraordinary array of 18th-century French art:
Miller Company Collection of Abstract Art be one of the greatest private collections of 20th century art in the world", reported the "Hartford Courant". The collection was estimated to be worth USD$84 million in 1987. In 2015 dollars, this amount can be very roughly estimated at over USD$150 million. In 2014, U.S. President Barack Obama was photographed in front of one of the artworks formerly in the Miller Company Collection of Abstract Art, "Victory Boogie Woogie" by Piet Mondrian, at its current location in the Netherlands. The artwork is also on the cover of a biography on Emily Hall Tremaine. The painting was sold in 1998