The Broad Sword can be picked up from the weapon stand on the right side of the Sarcophagus in the Mansion's Study. It's the first melee weapon which Adam finds and has probably been in extensive use by Florentine and his Templar associates, considering its rusty state.
Adam: I've heard mention and seen various swords around this place. Aelf mentions a sword, too.
- ↑ As referred to by the texture title: BSWORDF1.rusty broad sword.BMP