[3] From 30 October 1841, he was a member of the Assembly of Estates for Mersch, and entered the Commission of Government under the governor, Gaspard-Théodore-Ignace de la Fontaine.
[4] In the elections to the first Chamber of Deputies after the promulgation of the constitution, Pescatore ran for Luxembourg canton, and found himself in the unique position of being top of the electoral lists of all three parties.
[5] Despite having been in government before 1848, he showed no interest in returning afterwards,[4] and remained a legislator, being elected vice-president of the chamber in 1852, with Charles Metz as president.
[5] With the death of Metz the following year, Pescatore became the new president of the chamber, whilst the Willmar government was replaced by one under Charles-Mathias Simons.
[6] He decided to resign as deputy as well, but returned when re-elected at the head of the liberals' list in Luxembourg canton on 30 November 1857.