During the second half of the 19th century, the city became a major lumbering center, processing timber harvested in the region. Logs were floated down the Grand River to be milled in the city and shipped via the Great Lakes. The city became a center of fine wood products as well. By the end of the century, it was established as the premier furniture-manufacturing city of the United States. It was nicknamed "Furniture City" and exhibited many of its products at the Centennial Exposition in Philadelphia. "After an international exhibition in Philadelphia in 1876, Grand Rapids became recognized worldwide as a leader in the production of fine furniture."