Detailed Instructions: In this task, you're given passages that contain mentions of places and we are supposed to find the answer to a given question. Craft one correct answer to the question given in input. Make sure your correct answer is consistent with the context, and properly gives the exact location where the query was performed.
 In your answer, use as few words as possible from the given context. To be less repetitive, please vary your language for each question.
Q: Sentence: Chopin made his last public appearance on a concert platform at London's Guildhall on 16 November 1848, when, in a final patriotic gesture, he played for the benefit of Polish refugees. By this time he was very seriously ill, weighing under 99 pounds (i.e. less than 45 kg), and his doctors were aware that his sickness was at a terminal stage. 
Question: Where was Chopin's last public performance?
A:
Guildhall