Simplify the following text for a Grade 12 native English-speaking person.
Original: His reign is best known for financial reforms following the demise of the Julio-Claudian dynasty , the successful campaign against Judaea , and several ambitious construction projects , such as the Colosseum .
Simplified: His reign is best known for financial reforms , the successful campaign against Judaea , and several ambitious construction projects such as the Colosseum .