Complex sentence: In 1728 Count Zinzendorf visited Jena, and Spangenberg made his acquaintance; in 1730 he visited the Moravian colony at Herrnhut.
Split into simpler sentences: In 1728 Count Zinzendorf visited Jena, and Spangenberg made his acquaintance. In 1730 he visited the Moravian colony at Herrnhut.