There was no master architect for the nagri, and in fact the festival administration employed no architects at all, so each…

“There was no master architect for the nagri, and in fact the festival administration employed no architects at all, so each group was responsible for the construction of the section of the grid that it would inhabit and brought in its own contractors and construction teams. The festival site became a collage of cotton, bamboo, tin, plywood and plastic, materials typical of Indian slums, here converging in a constantly changing texture of materials and styles. By January, a fully functional city capable of supporting millions of residents stood where two months earlier there had been only a muddy plain, and throngs of holy men, teachers, students, tourists and service personnel brought the city to bustling life.”

– Rahul Mehrotra,‘Constructing the World’s Biggest (Disassemblable) City’ (2015)