Complex sentence: She entered a monastery of Poor Clares at Saint-Omer in northern France, then in the Spanish Netherlands, as a lay sister in 1606 and the following year she founded a new monastery of the Order specifically for English women at nearby Gravelines.
Split into simpler sentences: She entered a monastery of Poor Clares at Saint-Omer in northern France, then in the Spanish Netherlands, as a lay sister. In 1606 and the following year, she founded a new monastery of the Order specifically for English women at nearby Gravelines.