Meimoon Ghal'eh (Persian: میمون قلعه, literally "Monkey Castle" or "the Blessed Castle"), also known as Mehman Ghal'eh (مهمان قلعه) and Mobarak Ghal'eh (مبارک قلعه), is one of several castle ruins scattered throughout the Qazvin area, in Iran.

It sits in the south of the city of Qazvin, where has been always crowded, hence heavily eroded, and is almost 5000 square meters in footage.

The remains indicate the castle to have had a large dome in its central section.

Eight towers made of brick surrounded the castle.

This article about an Iranian building or structure related topic is a stub.