Isaac of Nineveh (613 - 700 AD), known also as St. Isaac the Syrian, was a Christian bishop in the Syrian Church of the East and theologian. He is best remembered for his works on Christian mysticism which have a strong ascetical character. He is regarded as a saint in almost all Orthodox churches, but not in the West. St. Isaac composed many ascetical homilies on the interior life, which are a favorite among Christian monks. They survive in Syriac manuscripts and in later Greek, Arabic, and Georgian translations. Isaac's writings offer an example of ascetical texts written by an experienced hermit and he is thus an important author when it comes to understanding early Christian asceticism. Many of his writings are included in the Philokalia.