Which of the given statements is/are true in the context of the Treaty of Vienna of 1815?

Statements: 

I. In 1815, representatives of the European powers – Britain, Russia, USA and France – met at Vienna to draw up a settlement for Europe.

II. The delegates drew up the Treaty of Vienna of 1815 with the object of undoing most of the changes that had come about in Europe during the Napoleonic wars.