In 1961 the OEEC became the Organization for Economic Co-operation and Development (OECD) and the chateau is since then the main conference center for the many meetings for country delegates coming on a regular basis to the OECD.
Last year was the 50 year celebration and the colorful design and 'advertisement' is still
"The OECD measures, analyses and compares to give the basis for better policies for a better life" - This is my translation and it makes me proud that the husband is part of this think tank.