Simplify the following text for a Grade 12 native English-speaking person.
Original: At CÃ cuta the constituent congress of 1821 met to draft the constitution of Greater Colombia ( present day Venezuela , Ecuador and Colombia ) .
Simplified: Several important events that forged Colombia as an independent republic took place in city : one of these events was the Congress of 1821 , where the Constitution of CÃ cuta was written and approved . This constitution created the Greater Colombia , a nation conformed by the present-day territories of Colombia , Venezuela , Ecuador , and Panama .