By 1830 Louisville passed Lexington as Kentucky's largest city, with a population over 10,000. The steamboat era saw the opening of the Louisville and Portland Canal just west of downtown, and local commerce picked up further with the founding of banks and manufacturing. Most of Louisville's population was packed into downtown, which by this time stretched as far south as Prather Street (later renamed Broadway). Many still-remaining buildings reveal what the area was like at this time, with narrow, two to four-story buildings packing the streets.