Giuliano de'Medici was killed by members of the Pazzi family in the Duomo during High Mass in 1478. Guernica was bombed by the Luftwaffe in 1937. Tanganyika and Zanzibar merged to form Tanzania in 1964. The nuclear accident at Chernobyl happened in 1986.
Born today: John James Audubon (1785-1851), Eugène Delacroix (1798-1863), Ludwig Wittgenstein (1889-1951), I.M. Pei (1917), Giorgio Moroder (1940) and Jet Li (1963).
As luck would have it, it is Union Day in Tanzania. Go figure.