Castrovalva (Doctor Who) - Outside References

Outside References

Castrovalva is the name of an early lithograph by the Dutch graphic artist M. C. Escher, and the design of the city in this serial reflects the impossible nature of many of Escher's later works. The story centres on the mathematical principle of recursion, a concept portrayed in much of Escher's artwork. Escher's lithograph depicts a town in Italy atop a steep slope, a setting similar to that of The Curse of Peladon, but there is nothing in the print itself to suggest the paradoxes of this story.

"Event One" appears to be a reference to the Big Bang – the creation of the universe. However, it is repeatedly described in this story as "the creation of the galaxy", which is believed to be a quiet, tranquil coalescing of hydrogen predating the first stars rather than a dramatic cosmic event.