There is 11 types or weapons. You need collect one from each type for the trophy. I got it just after the meeting the blacksmith (after dealing the boss Worshipper from the graveyard) and exploring a little of the catacombs (door accessible from the graveyard).
The types are:
Fist Weapons
Daggers
Shortswords
Swords
Greatswords
Poleswords
Hammers
Greathammers
Axes
Greataxes
Staves