Where did Hercule Poiret live?

Hercule Poirot, the famous fictional detective created by Agatha Christie, primarily lived in London, England. However, he is originally from Belgium, which is a significant aspect of his character. Poirot often returns to Belgium in the stories, reflecting his roots and the impact of his background on his methods of deduction. His London residence is often depicted as a comfortable flat where he engages in solving complex mysteries.