The question asks which foreign traveler did not visit the Vijayanagara Empire. The correct answer is "मार्को पोलो" (Marco Polo). This is because Marco Polo, a Venetian merchant and explorer, did not visit the Vijayanagara Empire during his travels. While he did travel extensively in Asia, including regions such as China and India, there is no historical evidence to suggest that he specifically visited the Vijayanagara Empire.