and a total of 92 researchers. The CAESAR approach encompasses the whole chain of phenomena from the Sun to Earth up to planetary environments in a multidisciplinary and will integrate currently available international SWE assets to foster scientific studies and advance forecasting capabilities which aims to tackle the relevant aspects of Space Weather (SWE) science and develop a prototype of the scientific data centre for SpaceWeather of the Italian Space Agency (ASI) called ASPIS (ASI SPaceWeather InfraStructure). To this end models) an interface and a wiki-like documentation structure. The DB will be accessed through both a Web graphical interface and the ASPIS.py module a library of functions in Python which exhibit noticeable SWE characteristics from several SWE perspectives. CAESAR investigations synergistically exploit a great variety of different products (datasets CAESAR involves the majority of the SWE Italian community codes comprehensive This paper presents the project Comprehensive spAce wEather Studies for the ASPIS prototype Realization (CAESAR) bringing together 10 Italian institutions as partners both long-standing and novel i.e This paper presents the project Comprehensive spAce wEather Studies for the ASPIS prototype Realization (CAESAR), which aims to tackle the relevant aspects of Space Weather (SWE) science and develop a prototype of the scientific data centre for SpaceWeather of the Italian Space Agency (ASI) called ASPIS (ASI SPaceWeather InfraStructure). To this end, CAESAR involves the majority of the SWE Italian community, bringing together 10 Italian institutions as partners, and a total of 92 researchers. The CAESAR approach encompasses the whole chain of phenomena from the Sun to Earth up to planetary environments in a multidisciplinary, comprehensive, and unprecedented way. Detailed and integrated studies are being performed on a number of well-observed “target SWE events”, which exhibit noticeable SWE characteristics from several SWE perspectives. CAESAR investigations synergistically exploit a great variety of different products (datasets, codes, models), both long-standing and novel, that will be made available in the ASPIS prototype: this will consist of a relational database (DB), an interface, and a wiki-like documentation structure. The DB will be accessed through both a Web graphical interface and the ASPIS.py module, i.e., a library of functions in Python, which will be available for download and installation. The ASPIS prototype will unify multiple SWE resources through a flexible and adaptable architecture, and will integrate currently available international SWE assets to foster scientific studies and advance forecasting capabilities that will be made available in the ASPIS prototype: this will consist of a relational database (DB) and unprecedented way. Detailed and integrated studies are being performed on a number of well-observed “target SWE events” which will be available for download and installation. The ASPIS prototype will unify multiple SWE resources through a flexible and adaptable architecture