The Ouddeelsmolen, also known as Lytse Geast or Swarte Prinsch (Black Prince), is a smock mill located in Tytsjerk, Friesland, Netherlands.

[2] The mill remained operational until 1963,[3] when it was equipped with Patent sails.

Now converted to holiday accommodation,[2] it was restored in 1994 by Aannemingsbedrijf Thijs Jellema of Burdaard, Friesland and new sails were added.

It is a one-storey smock mill on a single storey base.

Unlike other mills, it has no stage, with the sails reaching almost to ground level.