The Gothic arch is a key architectural feature that emerged during the Gothic period, primarily in the 12th century. Characterized by its pointed shape, the Gothic arch allowed for the construction of taller and more stable structures, enabling the creation of magnificent cathedrals and churches with soaring ceilings and large windows. This innovative design not only enhanced the aesthetic appeal of buildings but also improved their structural integrity. The use of the Gothic arch can be seen in iconic structures such as the Notre-Dame Cathedral and the Chartres Cathedral, showcasing the beauty and engineering prowess of the era.