Museum Piece is a main story mission in Grand Theft Auto IV, given by Ray Boccino.
It's the 63° GTA IV mission in chronological order, and it takes place in Algonquin.
Niko tries to sell the diamonds to Isaac Roth with Johnny Klebitz's support, but is interrupted and the diamonds are stolen by Luis Lopez, while the money is stolen by Klebitz.
- This mission crosses over "Collector's Item" (TLaD) and "Not so Fast" (TBoGT)
- This is the last time Johnny and Niko meet, and the second last time Luis and Niko meet.
Museum Piece: Mission Objectives
- Meet Johnny at the side entrance to the Libertonian.
- Escape the Libertonian.
- Lose Isaac's crew.
Museum Piece: Mission Info
- Mission Number 63
- Mission Giver
Ray Boccino - Location Drusilla's, Little Italy, Algonquin
- State / Area Algonquin
- Available After Mission (Story Mode)
- Rewards 9,500$; "Impossible Trinity" Achievement
- Unlocked Items
Combat Pistol 
No Way on the Subway - Featuring
Hellfury 
PMP 600 
Isaac Roth 
Johnny Klebitz 
Luis Fernando Lopez 
Mori Green 
Ancelotti Crime Family 
Pegorino Crime Family 
The Lost MC