 
<translate> Ahịrịokwu dị mkpa na amaokwu ahụ bụ: Banklọ akụ ahụ sitere na Bank of Calcutta, nke hiwere na 1806, site na Imperial Bank of India, na-eme ka ọ bụrụ ụlọ akụ azụmahịa kacha ochie na mpaghara India. Ya mere, azịza ikpeazụ bụ Bank of Calcutta. <eng> The relevant sentence in the passage is: The bank descends from the Bank of Calcutta, founded in 1806, via the Imperial Bank of India, making it the oldest commercial bank in the Indian subcontinent. So the final answer is the Bank of Calcutta. 