Viaduct Schools were the various minor academies built along the Central Viaduct of Sanctaphrax. There were two hundred in total. The Viaduct Schools were extremely small and highly-specialised, often focusing on subjects regarded as trivial or pointless by the larger schools. They had almost no impact on the politics of Sanctaphrax, and their staff and students were typically looked down upon by the more important academics. Viaduct academics could be distinguished by the colour of the robes they wore, a pale blue known as 'Viaduct Blue'.