US President Barack Obama and his wife Michelle donated 6.5% of their income to charity last year, according to their income tax return released by the White House.
Lord Sainsbury of Turville has made one of the largest ever donations to a British university, to fund a new research laboratory to study plant biology.
US philanthropist and legal scholar Arthur R. Miller has promised a gift of around 1,800 prints by Japanese artist Utagawa Kuniyoshi to the British Museum.
Hansjörg Wyss, a Swiss-born entrepreneur, has pledged $125m (£72m) to Harvard University to create the Hansjörg Wyss Institute for Biologically Inspired Engineering.