The Zohar is one of the book studied in Kabbalah and the Zohar is 700 years old. But other books and practices in Kabbalah are older. The other texts of Kabblah are "Bahir" , "Sefer Yetzirah" , Shaarei Teshuvah and Tomar Devorah. Some of These texts and other practices such as meditation have been around well before the "book of radiance - zohar", as Kakkarot mentioned. Gemartia (numerology) is also very old. However, the Zohar is a pretty important book in the study of Kabbalah, one of the main ones. Sorry if I have confused you with the dates.