Final answer:
The fascination with medieval architecture became popular during the Romantic era due to the Gothic Revival movement. This period looked to the Middle Ages for cultural authenticity and as a reaction against industrialization and rationalism.
Step-by-step explanation:
The fascination with medieval architecture as a model of cultural authenticity gained prominence during the Romantic era, specifically characterized by the Gothic Revival movement. This movement, beginning in the 1740s in England, was a response to the rationalism of the Enlightenment and the industrial changes of the era. The Romantic period's focus on emotion, nationalism, and the glorification of the past led to a renewed interest in Gothic architecture, with its emphasis on verticality, light, and intricate detailing seen as an embodiment of national and cultural authenticity.
Compounded by a sense of nostalgia for the Middle Ages and reactions against industrialization, the Gothic Revival became intertwined with philosophical trends and a reawakening of Christian traditions. Industrialization, which led to profound social changes, prompted a search for an idealized pre-industrial past, and the medieval period, with its associations with chivalry, spirituality, and community, fit this romantic vision.