Principessa Laetitia
| Name | Principessa Laetitia |
| Type | Steamer |
| GRT | 4,011 tons |
| Country |  Italian |
| Built | 1903 |
| Builder | Cant. Nav. di Muggiano, La Spezia |
| Operator | Navigazione Alta Italia, Soc. Anon., Genoa |
| History |
U-boat attacks on Steamer Principessa Laetitia
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 14 Mar 1918 | UB 49 (Hans von Mellenthin) | Sunk | Tyrranean Sea near Ponza Island | Genoa & Naples - ? | 0 |
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