Heinrich Schliemann was the man who discovered Troy.
He was a German classical archaeologist, an advocate of the historical reality of places mentioned in the works of Homer, and an important excavator of Mycenaean sites, such as Mycenae and Tiryns.
The house was built in 1879. The interior has been affluently garnished by "Pompeian" wall paintings and other decorative wall and ceiling illustrations. It is considered to be the best Renaissance-style work of Hernest Ziller.
In 1927 it was purchased by the Greek State and housed the Supreme Court. Now, it houses the Numismatic (Coin) Museum. It's just near Syntagma Square (blue or red metro line) and it's open to visitors.
Heinrich Schliemann in Wikipedia
Troy in Wikipedia