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Other Assets (Details) - Schedule of Other Assets - EUR (€)
Jun. 30, 2023
Dec. 31, 2022
Non-current other assets    
Prepaid expenses € 283,784 € 308,066
Total 283,784 308,066
Current other assets    
Prepayments on research & development projects 4,757,771 9,776,505
Prepaid expense 1,146,674 1,841,935
Others 501,422 2,552,071
Total 6,405,867 14,170,511
Total other assets € 6,689,651 € 14,478,577