Project Endings, a collaboration between digital humanists and librarians, is devising principles (https://raw.githubusercontent.com/projectEndings/Endings/master/principles.txt) for building DH projects in ways that ensure that they remain viable, functional, and archivable into the distant future. Endings principles cover five components of project design: Data Products Processing Documentation Release Management Previous Endings work has focused on Data and Products (Holmes 2017; Arneil & Holmes 2017) and diagnostic tools for monitoring project progress (Holmes & Takeda 2018 and 2019). This presentation will deal with the mechanics of Processing, focusing in particular on building large static sites which are resilient because they have no requirement for server-side technology at all. We will use the Map of Early Modern London (MoEML) project as a case study.