Antonius Johannes van Koolwijk OP (Winssen, 9 October 1836 – Hees, 1913) was a Dutch clergyman of the Roman Catholic Church.

His notable contributions lie in the field of archeological research, particularly his studies on the indigenous culture of Aruba, Bonaire, and Curaçao during the late 19th century.

[2] His father had previously served as steward at Slot Doddendael [nl], as well as a former mayor of Ewijk and Winssen, and a former member of the Provincial States of Gelderland.

His fascination with Amerindian history led him to conduct the initial archaeological explorations on Aruba, Bonaire, and Curaçao, making him the pioneering archaeologist of the Dutch Caribbean.

[12] Additionally, Van Koolwijk amassed an extensive collection of shells and crustaceans, carefully documenting their precise locations.

During his investigations, he collected materials found on the surface and conducted small excavations to study remnants from the pre-Columbian era.

The discoveries included pottery shards, stone tools, human skulls, and large burial urns containing bodies in a crouched position.

During the years 1883, 1885, 1886, and 1887, Van Koolwijk generously donated the data and materials he had gathered to the Rijks Ethnographisch Museum in Leiden.

In 1897, he received the honorary membership of the "Geschied-, Taal-, Land- en Volkenkundig Genootschap" or "Historical, Linguistic, Territorial, and Ethnological Society", located in Willemstad, Curaçao.