The document describes a project to develop a new website for Erarta, a large contemporary art museum and gallery in Russia, using OpenCms. The initial website had many issues including outdated technology, lack of integration, and inefficient content management. The project goals were to create a reliable platform, migrate legacy content, improve performance, and integrate various systems. It involved addressing complex requirements for managing different content types and languages. The project was successful through use of agile processes, continuous performance testing, and regular migrations to newer OpenCms versions for new features and improvements.