Short answers, pulled from the story.
Petrarch declared that European culture had entered the Dark Ages in the 1330s. This historical label defined the next seven centuries of Western thought and served as a deliberate rhetorical strategy to elevate the Renaissance as a new age of light.
The Gothic Revival began in the 1740s in England as an architectural movement. Leading figures included Augustus Welby Pugin who built the British Houses of Parliament in the 1840s, Viollet-le-Duc who restored Notre-Dame in Paris, and Ralph Adams Cram who designed the Cathedral of St. John the Divine in New York.
The Pre-Raphaelite Brotherhood was founded in 1848 by William Holman Hunt, John Everett Millais, and Dante Gabriel Rossetti. The group aimed to reform art by rejecting the mechanistic approach of Mannerist artists and the influence of Sir Joshua Reynolds.
Ludwig II of Bavaria built Neuschwanstein Castle in 1868. He decorated it with scenes from Wagner's operas, which served as a major Romantic image maker of the Middle Ages.
The International Society for the Study of Medievalism formalized its journal Studies in Medievalism in 1979. This event marked the discipline of medievalism becoming an academic area of research in its own right.
The exhibition Juggling the Middle Ages took place at Dumbarton Oaks from the 16th of October 2018 to the 3rd of March 2019. This event was one of the notable exhibitions about medievalism alongside New Medievalist Visions at King's College London.