Anyways, I searched Megaman Legends on GameFaqs and Nothing came up. Well, thanks though.
Here you go:
Antique Bell - Bring this to the curator, who will display it as a
"Kattelox Bell". Found in the Clozer Forest ruins' Sub Gate; Check the
area where you find an ID Card, inside one of the holes of a pillar will
be the Antique Bell.
Old Bone -- Bring this to the Curator, who will put it on display as an
"Ancient Digging Tool". Find this in the Cardon Ruins. After you've
found the Spring Set on the ledge, look in the hole on the wall of the
same ledge. Inside, is the Old Bone.
Old Doll -- Bring this to the Curator, who will put it on display as a
"Human Doll". Find this in a hole, right before the chest with the
Grenade Kit in it. Inside the hole, is the Old Doll.
Old Shield -- Bring this to the Curator, who will put this on display as
an "Antique Shield." You'll need the Jump Springs to reach this. Go
through the ruins near the Cardon Gate, and go through the door ahead of
you on the left. Search in a hole in the next area, and you should find
the Old Shield.
Shiny Object -- Bring this to the Curator, who will put it on display as
a "Crystal Fossil". Find this in the labyrinths. (Exact location
unknown at this time.)
Giant Horn -- Bring this to the Curator, who will put this on display as
a "Giant Horn". Find this by racing in the KTOX game, in the Technical
Course. Win on the A ranking, and you'll receive this as your prize.
Prism Crystal -- After you've collected all of the artifacts, and have
given them to the Curator, a girl will appear on the 2nd floor of the
museum. Talk to her, and take the Prism Crystal she offers. -- Used for
the Shining Laser special weapon.
All this was taken from VirgilKX's item list fact, so that's where the credit goes.