Use stream of consciousness to answer the following. Principal photography began on March 14, 2016, in Vancouver, British Columbia. Previously it was revealed at San Diego Comic-Con International that filming would begin in February 2016.

When did they start filming the death cure?
The relevant information to answer the above question is: Principal photography began on March 14, 2016, in Vancouver, British Columbia. Final answer: March 14 , 2016.