Which russian tsar supported intellectuals, poets, and playwrights and corresponded with enlightenment philosophers?

It was "Catherine the Great" who was the Russian Tsar who supported intellectuals, poets, and playwrights and corresponded with Enlightenment philosophers, since she was inherently and uniquely curious. 

I have multiple options <3
1. The states didn’t act immediately
2. The central government was designed to be very, very weak
3. The Articles Congress only had one chamber and each state had one vote
4. Congress needed 9 of 13 states to pass any laws
5. The document was practically impossible to amend

Hope that helped <3