Lithium hydride
Before the Castle Bravo nuclear weapons test in 1954, it was thought that only the less common isotope lithium-6 would breed tritium when struck with fast neutrons. The Castle Bravo test showed (accidentally) that the more plentiful lithium-7 also does so under extreme conditions, albeit by an endothermic reaction.
Giovanni Battista Trevano
Trevano started working in Poland around 1600. He was one of the team of architects and craftsmen who rebuilt the Royal Castle in Warsaw, on the basis of the old Gothic castle of the Masovian princes, which had already been completely remodeled by Italian architects in the second half of the sixteenth century. New work was undertaken in the years 1598-1619. He was not alone in this project: Giacomo Rodondo, Paolo del Corte and Mateo Castelli were all involved in remaking the castle into a new Baroque structure, on its imposing site along the bank of the river Vistula. The castle, much altered over the years, was bombed and dynamited by the Nazis as a symbol of Polish culture and was rebuilt in the years 1971–1988 as a national monument.