New York grew as an economic center, first as a result of Alexander Hamilton's policies and practices as the first Secretary of the Treasury and, later, with the opening of the Erie Canal in 1825, which connected the Atlantic port to the vast agricultural markets of the Midwestern United States and Canada.
Tammany Hall, a Democratic Party political machine, began to grow in influence with the support of many of the immigrant Irish, culminating in the election of the first Tammany mayor, Fernando Wood, in 1854. Central Park, which opened to the public in 1858, became the first landscaped public park in an American city.
These intense war-time riots are counted among the worst incidents of civil disorder in American history, with an estimated 119 participants and passersby massacred.
The rate of immigration from Europe grew steeply after the Civil War, and Manhattan became the first stop for millions seeking a new life in the United States, a role acknowledged by the dedication of the Statue of Liberty on October 28, 1886, a gift from the people of France.
In 1524, Florentine explorer Giovanni da Verrazzano – sailing in service of King Francis I of France – became the first documented European to visit the area that would become New York City.
He entered the tidal strait now known as The Narrows and named the land around Upper New York Harbor "New Angoulême", in reference to the family name of King Francis I that was derived from Angoulême in France; he sailed far enough into the harbor to sight the Hudson River, which he referred to in his report to the French king as a "very big river"; and he named the Bay of Santa Margarita – what is now Upper New York Bay – after Marguerite de Navarre, the elder sister of the king.
The word "Manhattan" has been translated as "island of many hills" from the Lenape language.