The last marriage record to arrive from the Poznan Project was for Michael Mruk (Mrók) and Margaretha Plenzler.

Margaretha was my great-grand aunt, daughter of Joseph Plenzler and Mary Lesiecka. More on Margaretha and Michael here.

Transcription with a rough translation is below.

1866
No. 13
Annus et dies benedictiones sacerdotalis: November 12 — The marriage took place November 12, 1866.
Nomen sacerdotis benedictionmen sacerdotalem administrantis: L. Edwardus Annesburg The priest who officiated the marriage was L. Edward Annesburg.

Nomen, praenomen et cognomen sacro ritu coniunctorum. Sedes conditio et professio, et nomen benedictio sacerdotalis en ecclesia vel domi peracta sit. The names/personal names and family names of those who wish to be joined in the sacred right of marriage before this church.
Michael Mrók, Juvenis Michael Mrók, the young man
et and
Marianna Lisieka, Virgo Margaretha Plenzler, the maiden
ambo de Wiorek both of Wiorek

Utrum iam prius conjugum iniverint, nec non utrum ad hue sub potestate parentum vel tutorum sint. They are to put aside earlier times to undertake a life of  husband and wife to protect and defend

Aetas ages
Sponsi: 20  Groom, 20
Sponsae: 15 Bride, 15

Religio sponsi, sponsae Cath. Religion of the bridge and groom is Catholic

Cum consensum parentum. With consent of the parents.

Dies proclamationes: Marriage banns (announcements of the intent of marriage were made)
Dom. XXII, XXIII, XXIV p. Pentec. The 22nd, 22rd, and 24th weeks of Pentecost

Dies dispensationum, si qua forent: nulla Were proper dispensations made in case of annullment due to form (Null, first marriage)

Nomen, conditio et professio testium qui benedictioni sacerdotali adfuerunt: Name and identification of witnesses
Andraes Plensler, de Wiorek Andraes Plensler, of Wiorek
Josephus Demel,  Joseph Demel, of Wiorek

It appears that Margaretha’s uncle, Andreas witnessed the marriage. I do not know who Joseph Demel is, another clue to follow later since generally it was a blood relative who witnessed marriages. Unfortunately, no real new knowledge about the family from this record it seems!