The archives of this period were mainly destroyed in the fire after the 1755 Lisbon earthquake, and what was not destroyed during the earthquake was either stolen or destroyed during the Peninsular War or otherwise lost.
這個時期的檔案主要在1755年里斯本大地震後在火災中被破壞，在地震期間沒有被毀壞的東西在半島戰爭期間被盜或被摧毀或以其他方式丟失。