[1] During his reign, he maintained good relationships with the king of Poland, Władysław II Jagiełło.

[2] Petru also acted as an intermediary in the negotiations between the Wallachian voivode Mircea the Elder and the Polish king that resulted in the treaties signed by the two parties in 1389 and 1390.

He also fixed the princely seat of Moldova at Suceava in 1388, effectively dooming the Latin Diocese of Siret in the old capital, and maintained Orthodox Bishop Iosif at Cetatea Albă, contrary to the wishes expressed by the Patriarchate of Constantinople, resulting in his excommunication.

[4] During his reign, a number of important coins were minted; the ones attributed to him, known so far, are: groschen and far more rare half-groschen made of silver.

Obverse: Aurochs head, frontal view, a star between the horns, a rose on the right, a crescent on the left.