The city of Basle is a five-letter crossword solution for the term 'City of Northwest Switzerland'. It is located in the northwest corner of Switzerland, on the border with France and Germany. Basle is the third most populous city in Switzerland, with a population of approximately 175, 000 people. It is known for its cultural attractions, including its many museums, galleries, and theatres. Basle is also home to several universities, making it an important educational hub in the region.