Detailed Instructions: Generate a question which can yield the answer mentioned in the input. Generated question must be answered by the answer provided in input, without using any extra knowledge.
Q: Context : Saint Ambrose barring Theodosius from Milan Cathedral is a 1619--1620 painting by Anthony van Dyck, now in the National Gallery in London.
Answer : National Gallery
A:
What is the name of the place where Saint Ambrose barring Theodosius from Milan Cathedral can be found?