Who started the fire is not entirely certain. The blame was placed on a Marinus van der Lubbe (although it is likely taht he was either forced to by the Nazi Party or was framed by them).
The Reichstag was the Parliment building for Germany. Historians can not guarantee that it was Hitler who made the man set it alight, but that is who the finger is pointed at. It was set alight...
It is not proven, but the Emperor Nero wanted to build his new palace on the site of two old Roman temples, and to destroy them would have made him even more unpopular than he already was. It is...