It most commonly translates to "I am leaving from the..." (e.g., Je pars de la maison — I am leaving the house). It's a standard construction using the verb partir followed by a location.
Partir Conjugation in French | Charts & Sample Conversation - Study.com
Could you clarify if you're looking for a , a history of the sailing vessel , or a summary of a theological text ?
In academic circles, it often refers to the Tertia Pars (Third Part) of Thomas Aquinas's Summa Theologiae , specifically discussions regarding the Tertia Pars de la Somme de théologie .