Which structure is often considered the starting point of Gothic architecture in Europe?

The Basilica of Saint-Denis

The Basilica of Saint-Denis, located on the outskirts of Paris, is recognized as the first masterpiece of Gothic architecture, a style that deeply influenced medieval Europe. Its construction began in the early 12th century under the direction of Abbot Suger, who wanted to create a space filled with light symbolizing the divine presence. To achieve this, he innovated with the use of colored stained glass and flying buttresses, allowing for higher and thinner walls, and light flooding the interior. This basilica is not just a burial place for the kings of France; it also laid the architectural foundations that inspired the construction of many Gothic cathedrals across Europe.