From a reported interview with Terry Gilliam:

Question: "You said in an interview that The Zero Theorem
was very influenced by Bucharest. In what way?"

Some related material from Log24:

IMAGE- 'Bright Star,' from March 30, 2013

See also a Google search from this evening—

— and the beginning of the Zero Theorem  screenplay —

FADE IN:
A rim of swirling light appears, circling helplessly into a
gigantic BLACK HOLE. It spirals inward…