The aim of the RESEL-ELACE project (Refined European sea level estimations by combining altimetry, tide gauges, hydrographic and other data sets with improved regional GIA modeling and tailored regional ELACE gravity field models) is to refine European sea level estimations by combining altimetry, tide gauges, ARGO float data, hydrographic and other data sets with improved regional GIA modeling and tailored regional ELACE gravity field models. Objectives of this CRP include (i) to derive regional mean and time-variable gravity models directly from ELACE instrument data for dedicated European regions of interest; (ii) to update the regional sea level rates in the Mediterranean Sea using multi-satellite altimetry, tide-gauge and hydrographic data, and to explain the water mass contribution to sea level by using ELACE measurements of gravity due to redistribution of water mass; (iii) to improve estimates of glacial-isostatic adjustment in Northern Europe, and to improve our knowledge of the shallow earth structure and rheology of the region.