I am wondering whether Gödel believe ain the existence of his rotating universe since he is a mathematical Platonist. I am also wondering in what entities believe mathematical platonists. For example: do they believe only in "basic" mathematical entities like sets, numbers etc.? Or also in mathematical theories in their entirety? To clarify, if I have Gödel's rotating universe and I am a mathematical platonist, am I supposed to believe that the rotating universe exists since it is mathematical? Or I am supposed to believe only in the existence of all the singular entities that constitute the rotating universe (e.g. numbers) but not in the theory in its entirety? I am sure that there are a lot of mistakes in my reasoning and I am sorry for that but I do not know almost anything about that, I heed some help.