It Is Believed That Shree Yantra Is One Of The Rarely Found Precious And Oldest Yantra Which Was Created By ?Adi Guru?. Since The Vedic Period, When Existence Of Metal Was Realised, Formation Of Yantras Was Seen That Benefited Everyone. The Yantra Is Also Known As ?Koorm Prishthiya Meru Shree Yantra? Which Means The Shree Yantra Is Mounted On The Top Of Tortoise Back. It Is Believe That The Lord Vishnu In The Lord Kachehap Avtar Lifted The Weight Of Earth On His Back (Meru Prishth). This Yantra Can Be Kept In House. Cash-Box, Locker Or In Temple.