Complex sentence: The congregation dates back to the 1820s, 12 years after the founding of Greensboro, they met in a male academy, which continued for until 1830, when they bought a lot, and by 1831, had a small, 2 story building.
Split into simpler sentences: The congregation dates back to the 1820s, 12 years after the founding of Greensboro. They met in a male academy, which continued until 1830, when they bought a lot, and by 1831, had a small, two story building.