In 2002, Thomson and his father paid a world record price of $76.7 million to acquire Rubens' "Massacre of the Innocents", now the centrepiece of the Thomson Collection at the Art Gallery of Ontario. In 2012, Thomson shattered records buying a painting by Danish artist Vilhelm Hammershøi, "Ida Reading a Letter", paying the highest price ever for a Danish artist. In 2012, Thomson broke the record for the most expensive 18th-century British watercolour when he paid £2.4 million for a small landscape by John Robert Cozens.