Saenamteo (Korean: 새남터) is a location on the north bank of the Han River in Seoul, South Korea.

[1] that was used punishment of political prisoners, including Roman Catholic believers, priests, and missionaries among the Korean Martyrs.

[4] The site was a strip of sandy and wet land between the Han River to the south and the Fortress Wall of Hanyang (now Seoul) to the north.

[5] Saenamteo was used from the early Joseon Dynasty for military training and as a place of punishment for those convicted of political crimes.

In 1456, a number of royal officials were executed there for plotting to overthrow Sejo of Joseon and restore his deposed nephew, Danjong, to the throne.

[6] The Saenamteo site is most famous as the place of execution of Roman Catholic martyrs during four anti-Catholic persecutions in the 19th century, occurring in 1801, 1839, 1846, and 1866.

The priests were Bishop Siméon-François Berneux, Simon-Marie-Just Ranfer de Bretenières, Bernard-Louis Beaulieu, Pierre-Henri Dorie, Charles-Antoine Pourthié, and Marie-Alexandre Petitnicolas, and the laymen were Woo Se-young and Jeong Ui-bae.