The death of her only son and his mistress Mary Vetsera in a murder–suicide at his hunting lodge at Mayerling in 1889 was a blow from which Elisabeth never recovered. She withdrew from court duties and travelled widely, unaccompanied by her family. In 1890, she had a palace built on the Greek Island of Corfu that she visited often. The palace, Achilleion, featuring an elaborate mythological motif, served as a refuge. She was obsessively concerned with maintaining her youthful figure and beauty, which were already legendary during her lifetime. In 1897, her sister, Duchess Sophie in Bavaria, died in an accidental fire at the "Bazar de la Charité" in Paris. While travelling in Geneva in 1898, she was mortally wounded by an Italian anarchist named Luigi Lucheni. Elisabeth was the longest serving Empress of Austria at 44 years.