The Manor of Lazaros Kountouriotis, great ship owner who played important political role to the rebellion, is located near the harbour and it is a typical example of a traditional Hydraian Manor.

This Manor was donated to the Historic-Ethnologic Institute of Greece, by Lazaros Kountouriotis descendance. Today, it operates as an outlier of the National Museum of History.

The Manor is divided into three levels.

The ground floor is divided into two parts. The first part used to be the auxiliary rooms of the Manor and now the visitor can see various painting from the artists Periklis and Konstantinos Byzantios.

The second part used to be the main room of the Manor and today there are exhibits of old furniture, mirrors, portraits and family heirlooms of the family Kountouriotis.

In the first floor there are exhibits of historical collections from the National Museum of History, like Greek Art of 18th and 19th Century.