Original sentence: The most commonly held believe that Indians didn't know how to construct arches and vaults was popular in Archaeological survey of India during 18th and major portion of the 19th century.This belief was later debunked by ASI head Alexander Cunningham in the following manner
Edited sentence: "True" arches with voussoirs were not used in later medieval Hindu temples, and the Indian builders of the earliest mosques of the Delhi Sultanate used corbelled arches.Among a number of architectural styles and traditions, the contrasting Hindu temple architecture and Indo-Islamic architecture are the best known.Both of these, but especially the former, have a number of regional styles within them.But earlier Indian architecture did use the arch, as explained by Sir Alexander Cunningham, head of the Archaeological Survey of India: