 Complete the following phrase:  The initial nucleus of the collection dates from the French Revolution. By the Decree of 22 November 1790, Gabriel Eleanor Merlet de la Boulaye 17361807 is assigned the gathering of all books and natural history collections seized in the national houses. Recovered from the whole region, especially from the houses of emigrants, they are initially stored in Saint Sergius Abbey, Angers. Unfortunately, they were plundered by the 