What is a religious grotto?

For how many days Lord Krishna gave Geeta upadesh to Arjuna? In Judaism what is the process called to question and argue theology freely with no right or wrong thoughts theories or direction etc? Are there any messianic judaism cults? Where can you obtain a copy of the Jewish Bible? What is the meaning behind the name aparna? What is the core of Buddhism? The musician that composed over 100 masses and directed all music for the Vatican? Why did simeon and Levi kill all Hamors men? How did the pharisees get purity? Who lived 500 years before Siddhartha Gautama? Who was the frist great Buddhist king? What year was roman catholicism restored? What did Saint Augustine say about our hearts resting in you? What is brand mantra? Where is the oldest Christian church located? What phrase do Muslims repeat as an expression of their faith? Is purgatory after last judgment? Why did god want to kill himself? What happened to Satan that led to his downfall"? Why do Jews find the term Old Testament offensive?