Pieter Datheen

[1] Third, he translated the famous "Form for the Administration of Holy Baptism" from Heidelberg with its very orthodox emphasis on the Covenant of Grace containing two parts.

Fourth, he translated the equally famous "Form for the Administration of the Lord's Supper," also from the Palatinate, still used by orthodox Reformed churches today.

Seventh, he developed the liturgy (order of worship) used by orthodox Dutch and American Reformed Churches with the singing, alms, prayer, and preaching at the required places.

[2] In his theological-political writings Datheen displays the typically optimistic view of early Calvinist writers in the Netherlands regarding the state,[3] although his very strong views on making sure to avoid all compromise with Roman Catholic guided countries, like Spain, put him at great odds with Prince William the Silent (of Orange) and led to Datheen's multiple political ostracizations from his fatherland.

[4] Recent research based on stylometry mentioned him as a possible author of the text of the Dutch national anthem Wilhelmus.