The first reported sighting by Europeans of the wide plain that the Aborigines called 'Omeo' was by the naturalist John Lhotsky from the southern Alps in 1834. The area was first visited by stockmen who drove stock through the region as early as 1835. In 1845 gold was found in the Livingstone Creek which runs through Omeo, this caused the population to boom and by 1901, Omeo was at its peak with a population of 9400. They were prosperous times. The main street, Day Avenue, was packed every night with people out strolling, shopping and enjoying the evening air. Hotels and cafes were doing a roaring trade with free-spending miners, and businesses were booming. Businesses began to establish themselves. Banks arrived. In 1889, the Colonial Bank of Australia. In 1892, the Commercial Bank. A.J. McDonald, one of the colony's leading architects designed the post and telegraph office and new courthouse. They were completed in 1891 and 1892 and remain unique for their architecture to this day.