Final answer:
The question refers to Sainte-Chapelle, a royal chapel constructed in the 13th century for the French king to house Christian relics. It is famous for its Gothic architecture and stained glass windows. The surrounding complex included other institutions such as the School of Chartres, notable during the Gothic period.
Step-by-step explanation:
The subject appears to be La Chapelle aux Saints, which could be a misinterpretation or confusion with Sainte-Chapelle, located on the Île de la Cité in Paris. Sainte-Chapelle was a royal chapel constructed in the 13th century within the palace grounds of the French king. It was commissioned by King Louis IX to house precious Christian relics, including what was believed to be Christ's crown of thorns. This chapel is renowned for its Gothic architecture, particularly its rich stained glass windows and the spire which resembles the points on a crown. However, it is not clear what the student means by 'what was it missing?' Without additional context, it is difficult to provide a precise answer to that part of the question.
During the Gothic period, the complex surrounding Sainte-Chapelle included a range of important institutions, such as schools, a palace for the bishop, and a hospital. Chartres was one such location with a significant educational institution akin to a university, the School of Chartres. Furthermore, the town of Chartres was a major destination in itself, particularly noted for its cathedral.