Was Tirupati Balaji a Buddhist Shrine? I had read occasionally on internet that Tirupati Balaji was a Buddhist Shrine. So Was Tirupati Balaji a Buddhist Shrine ?
There's a book by K. Jamanadas "Tirupati Balaji was a Buddhist Shrine", whose preface starts with,


  [This book] has potential credibility to create
  controversies unknown to historical writing and the Hindu common folks who flock to worship Tirupati Balaji
  as one of the supreme deities. It is also a new challenge to indologist at a time when politically imbued
  scholars are engaged to wash out their hands by proving and disproving claims of Hindus and the Muslims
  against each other as they did over the issue of Ayodhya Shrines.


Its conclusion is that


  The image of Lord Venkatesvara was not sculptured by the artist as an image of Vishnu, but that of
  Avalokitesvara, sometimes in the reign of Kalabhras, after the period of Mamulanur, and before the period of
  Silappadhikaran, around 3rd to 5th century A.D.