The website of the Daughters of Charity, USA Province of St. Louise describes it this way:

In 1633, the Daughters of Charity were founded in Paris, France, by St. Vincent de Paul and St. Louise de Marillac. Deeply concerned with the poverty and suffering surrounding them, they brought together a group of young women who shared their dedication of helping the poor and the sick. These first twelve peasant girls were unlike other Sisters at the time in terms of both social and economic status and their desire to live and work among those in need. This challenged conventions when Sisters predominantly lived cloistered lives with less interaction with individuals suffering in the streets.

On the eve of St. Andrew’s Feast [November 29, 1633], they bound themselves to Christ with simple vows that were to be reaffirmed annually.

Learn more in this YouTube video. (Press the spacebar or click on the Pause button to stop the video whenever you need more time to read.)