Leszek I the White
At the synod of Wolborz in 1216 he gained further privileges for the church from Leszek I the White, Konrad of Masovia, Duke Wladyslaw and Casimir I of Opole. He then convened similar meetings in 1217 at Dańkowie and Sądowlu 1218, where a pact was formed between the Polish rulers.