Following the collapse of the Western Roman Empire in the fifth century, much of Aristotle's work was lost in the Latin West. The "Categories" and "On Interpretation" are the only significant logical works that were available in the early Middle Ages. These had been translated into Latin by Boethius. The other logical works were not available in Western Christendom until translated into Latin in the 12th century. However, the original Greek texts had been preserved in the Greek-speaking lands of the Eastern Roman Empire (aka Byzantium). In the mid-twelfth century, James of Venice translated into Latin the "Posterior Analytics" from Greek manuscripts found in Constantinople.