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Bank Loans (Details) - EUR (€)
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Bank Loans [Line Items]      
Bank loan interest expense € 586,713 € 198,580 € 287,281
Unsecured bank loans € 3,600,000    
Interest payable average rate 2.11%    
Bottom of range [Member]      
Bank Loans [Line Items]      
Maturity term 1 year    
Top of range [Member]      
Bank Loans [Line Items]      
Maturity term 3 years    
Bank Loan [Member]      
Bank Loans [Line Items]      
Bank loan interest expense € 336 5,367 12,618
Line of Credit [Member]      
Bank Loans [Line Items]      
Interest expense € 37,606 € 147,761 € 133,977