The main goal of the Soil Mission MARVIC project is to develop a framework for designing harmonized context-specific Monitoring, Reporting and Verification (MRV) systems for carbon farming, in support of the EU Carbon Removals and Carbon Farming (CRCF) regulation. The scope of this report (MARVIC Deliverable 2.1) is to provide a metadata dataset of benchmark sites (BS) that are relevant to the calibration and validation of models used within the MARVIC test cases. The dataset provided by Deliverable 2.1 describes the main characteristics of each site, such as pedoclimatic conditions, management practices applied, soil chemical, physical, and biological parameters, and details the measured variables that have been collected over time.