Słonowice [swɔnɔˈvit͡sɛ] (German: Groß Schlönwitz)[1] is a village in the administrative district of Gmina Kobylnica, within Słupsk County, Pomeranian Voivodeship, in northern Poland.

During the 1930s the estate was 90% owned by Professor Albrecht von Blumenthal, 10% by his brother Robert, who resided there.

After the Gestapo had closed the preacher seminary in Stettin-Finkenwalde in autumn 1937, in December the same year the brothers Albrecht and Robert von Blumenthal permitted its lecturer, the Protestant pastor and theologian Dietrich Bonhoeffer, to use the local vicarage as an illegal seminary (Sammelvikariat).

The pastors of Groß Schlönwitz and neighbouring villages supported the education by employing and housing the students as vicars in their congregations.

[3] In summer 1939 the seminary could move to Sigurdshof, an outlying estate (Vorwerk) of von Kleist family in Wendisch Tychow.