Freemason's grave

We had an evening walk in the Hatanpää mansion park. There is a lonely stone next the footpath near the lake., it's a freemason's grave. The text engraved in the stone is greek and it means "the Lord knows those who are his". The stone is from the late 18th century. It's not known, if somebody is buried there or is the grave stone only symbolic.

There is terribly hot in the Europe, +45.1°C in France today! I wonder is Finland the only country where the temperature is below 20°C. Anyway, I rather take this than +40°C. 

+18°C, sunny