It didn't say. I did a search on 'Schliemann's Gold' and that turned up. ...and it looks like it's gone now.
Most of the artifacts from the shaft graves at Mycenae are in the National Museum in Athens.
If you ever get the chance to go, don't miss the site. It is absolutely spectacular.
(famous Lion's Gate)
Just one slight point of correction - the gold shaft grave masks are from Schliemann's later excavations at Mycenae. The "Treasure of Priam" came from Troy, and consisted primarily of women's jewelry, most notably an elaborate gold headdress with numerous shoulder-length pendants and matching necklaces. This is the treasure that was in the Berlin Museum and was stolen by the Russians. Here is a photo of Schliemann's Greek wife, Sophie, wearing the headdress and necklaces.