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.
دمرت محفوظات هذه الفترة في النار بعد زلزال لشبونة 1755 ، وما لم دمرت أثناء الزلزال وإما سرقت أو دمرت خلال الحرب في شبه الجزيرة أو فقدت خلاف ذلك.