Who built the walls of derry?

The Walls of Derry, also known as the Derry City Walls, were constructed in the early 17th century, primarily between 1613 and 1618, by the city's founders, the London Company, as part of a plan to establish a fortified city. The walls were built to protect the settlers from potential attacks and to secure the area during a time of conflict in Ireland. They are one of the best-preserved examples of city fortifications in Europe.