Ordinum Hollandiae ac Westfrisiae pietas (The Piety of the States of Holland and Westfriesland) is a 1613 book on church polity by Hugo Grotius. It was the first publication of Grotius, a prominent jurist and Remonstrant, concerned with the Calvinist-Arminian debate and its ramifications, a major factor in the politics of the Netherlands in the 1610s. The Ordinum pietas, as it is known for short, gave a commentary on the Five Articles of Remonstrance of 1610 that were the legacy of the theological views of Jacobus Arminius, who died in 1609. Source: Wikipedia (en)