Magdeburg rights (German: Magdeburger Recht; also Magdeburg Law) were a set of town privileges first developed by Otto I, Holy Roman Emperor (936–73) and based on the Flemish law, which regulated the degree of internal autonomy within cities and villages, granted by the local ruler. Named after the German city of Magdeburg, these town charters were perhaps the most important set of medieval laws in Central Europe thus far. They became the basis for the German town laws developed during many centuries in the Holy Roman Empire. Even more importantly, adopted and modified by numerous monarchs including the rulers of Bohemia, Hungary, and Poland, the laws were a milestone in urbanization of the entire region and prompted the development of thousands of villages and cities.