The "Sherlock Holmes Universe" refers to the fictional world created by Sir Arthur Conan Doyle, centered around the brilliant detective Sherlock Holmes and his loyal friend Dr. John Watson. Set primarily in Victorian London, this universe features a range of intriguing characters, including the cunning criminal Professor Moriarty and various clients seeking Holmes's expertise in solving complex mysteries. Holmes is known for his keen observation skills and logical reasoning, often using forensic science to crack cases. The universe has expanded beyond the original stories, inspiring numerous adaptations in film, television, and literature, making Sherlock Holmes a timeless figure in detective fiction.