Complex sentence: In 1784, he founded the Bank of New York, one of the oldest still-existing banks in America, having operated under that name continuously for over 220 years before merging with Mellon Financial in 2007 to form BNY Mellon.
Split into simpler sentences: In 1784, he founded the Bank of New York, one of the oldest banks in America. The Bank of New York operated under that name continuously for over 220 years before merging with Mellon Financial in 2007 to form BNY Mellon.