Answer :

It's Mildendo where the emperor 's palace was.

Gulliver in one of his "Travels to Several Nations of the World", as the book is originally called, encounters the country of Lilliput inhabitted by small human creatures. The "man-mountain" is made captive for he is considered dangerous. However, after obtaining his liberty, the first request he makes is to "have license to see Mildendo, the metropolis", under the restriction of not hurting anyone. The metropolis is named Mildendo.