Küçüksu Kasrı is a small palace located in Istanbul, Turkey. The palace was built in the 19th century during the Ottoman Empire and was used as a summer residence by the sultans. The palace is situated on the Asian side of Istanbul, on the shores of the Bosphorus strait, and it has a beautiful view of the city. The palace features a mix of Ottoman and European architectural styles, and is known for its ornate tile work, calligraphy and frescoes. The palace is open to the public for tours and also serves as a venue for events and weddings.