Mackay arrived in Tamsui on the ninth of March, 1872, and went straight to work. He preached, he learned the Taiwanese language and local customs, and the first house he rented served as home, clinic and place of worship all at once. Faith and medicine grew up under one roof here. As the congregation grew, space ran short. Around 1890, the doctor's residence beside the Mackay clinic was converted into a chapel, laid out in two halls with a small courtyard. Mackay died in 1901, and the church entered a new era without its founder. In 1915 the old building made way for something new. The missionary builder William Gauld, a well-known church builder of the time, oversaw a small brick chapel with whitewashed walls in a North American style, with a bell tower above the front door. It cost 1,390 silver dollars and was nicknamed the White Church. It lasted less than 20 years, but it left a legacy: its bell was reused in the later church, and its bricks were recycled into the interior walls of the one you see today.