The Melchers Building is the oldest extant commercial building in Honolulu. Made of coral block, which is still visible on the rear wall, its basement was blasted out of solid coral rock. This straightforward, utilitarian building initially housed Melchers and Company, a German import, commission merchant, and ship chandlers firm catering to the port's whaling industry. In 1867, A. F. Melchers retired and returned to Germany. F. A. Schaefer, a clerk at Melchers and Company, who had immigrated to Honolulu from Bremen, Germany, in the 1850s, purchased the business and renamed it after himself. F. A. Schaefer and Company occupied this corner until 1924. The building has been utilized for city and county of Honolulu offices since 1954. The frames of the building's former iron double doors are still visible, encasing more recent first-story windows. The granite-block sidewalk in front of a segment of the building dates to the late 1880s, arriving in the city as ballast on ships from China. The ceramic street signs embedded on the Merchant and Bethel streets corner are a rare survivor of a city signage program in 1939.