Also known as the Philomath Society, it was a secret student organization that emerged in the early 19th century in the Russian-occupied territories of Poland and Lithuania.
Due to his involvement with the Philomaths and his activism for Polish culture, Pietraszkiewicz came under the scrutiny of the Russian Empire government and was arrested and sentenced to exile.
Pietraszkiewicz continued to support Polish culture and assist fellow exiles during his time in Siberia.
After his death in 1863, Pietraszkiewicz was buried at the Rasos Cemetery in Vilnius, which is located in present-day Lithuania.
The cemetery holds historical significance and is the resting place for many notable figures from Polish and Lithuanian history.