Where was the most influential northern school of art in the fifteenth century centered?

The most influential northern school of art in the fifteenth century was centered in Flanders, particularly in cities like Bruges and Ghent. This region became renowned for its oil painting techniques and detailed realism, exemplified by artists such as Jan van Eyck and Rogier van der Weyden. Their work significantly impacted the development of Northern Renaissance art, focusing on intricate details and vibrant colors. The school played a crucial role in the evolution of European art during this period.