Statement Of Cash Flows [Abstract]
| Concept | 2024-01-01 to 2024-12-31 | 2023-01-01 to 2023-12-31 | 
|---|---|---|
| Statement of cash flows [abstract] | ||
| Cash flows from (used in) operating activities [abstract] | ||
| Adjustments for interest income | 
                                                241,606
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                248,646
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Adjustments for decrease (increase) in other assets | 
                                                6,972
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                3,727
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Adjustments for depreciation and amortisation expense and impairment loss (reversal of impairment loss) recognised in profit or loss | 
                                                58,868
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                25,494
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Adjustments for gains (losses) on fair value adjustment, investment property | 
                                                142,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                57,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Cash flows from (used in) investing activities [abstract] | ||
| Dividends received from investments accounted for using equity method, classified as investing activities | 
                                                11,901
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                8,819
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Proceeds from sales of investments accounted for using equity method | 
                                                -
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                -
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Purchase of investment property | 
                                                -
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                959,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Proceeds from sales of investment property | 
                                                -
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                3,250
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Proceeds from disposal of non-current assets or disposal groups classified as held for sale and discontinued operations | 
                                                -
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                2,504
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Cash flows from (used in) financing activities [abstract] | ||
| Proceeds from issue of ordinary shares | 
                                                -
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                37,403
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             |