Birthdays on January 13
Philip Jacob Spener was born in Rappaltsweiler, Germany. He founded German pietism. While preaching in Frankfurt, he held semiweekly Bible studies (known as Collegia pietatis) in his home. The name came to be associated with its followers, who were eventually called Pietists.
Birth of Alexander Whyte, a Free Church of Scotland minister. He became notable as an educator and author, with books on Scottish John Bunyan, Lancelot Andrewes, Samuel Rutherford, and Thomas Sheppard. He wrote on many other religious topics.