the Church to heaven. Russell split from Barbour over doctrinal differences and began publishing Zion's Watch Tower in July 1879. Great Pyramid of Giza (1876–1928) Influenced by the pyramidology theories of John Taylor and Charles Piazzi Smyth, Nelson Barbour and Charles Russell taught that the Great Pyramid of Giza contained prophetic measurements in "pyramid inches" that pointed to both 1874 and 1914. Russell viewed the Great Pyramid as "God's Stone Witness and Prophet". Smyth reviewed Russell's manuscript on the Great Pyramid before publication. Russell credited him and Scottish writer Robert Menzies for the view "that the Great Pyramid is Jehovah's 'Witness', and that it was as important a witness to divine truth as to natural science." Prophetic dates derived from the measurements inside the Great Pyramid were seen as complementary to biblical interpretations. Russell included the Great Pyramid as part of his film and color slide production The Photo-Drama of Creation in 1914, suggesting that the Great Pyramid was built by the Old Testament king-priest Melchizedek. A special edition of the first volume of Studies in the Scriptures was also published, which was re-titled The Divine Plan of the Ages and the Corroborative Testimony of the Great Pyramid. In accordance with Russell's wishes, a high replica of a pyramid was erected at his gravesite in Pittsburgh, Pennsylvania with its capstone "patterned after the capstone of the Great Pyramid of Egypt, symbolic of the Christ." Russell's interpretations of the Great Pyramid were supported by the writings of John and Morton Edgar who were prominent members of his movement. Russell had first stated that 1874 was derived from a measurement of 3416 pyramid inches, but the measurement was revised in the 1910 edition to to point to 1915. The Edgars claimed that the revision in measurement and change in date was a result of errors made by Smyth. In the early 1920s, the significance of the pyramidological predictions for 1914 were re-interpreted to mean that "the old evil order began to pass away in 1914." In 1924, an issue of Golden Age referred to the Great Pyramid as "the Scientific Bible" and added that measurements on the Grand Gallery inside the Great Pyramid confirmed the dates 1874, 1914 and 1925. Similarly, the 1924 publication The Way to Paradise refers to the Great Pyramid as "the Bible in Stone" and concludes: In 1928, the belief that the Great Pyramid contained a prophetic blueprint