Strechau Castle, Renaissance castle and automobile museum in Lassing, Austria.

Strechau Castle is a Renaissance castle in the municipality of Lassing in Styria, set on a rocky spur above the valley. It consists of several wings with decorated rooms, exhibition spaces, and baroque outbuildings that once served as storage.

The name Strechau appears in documents in 1074, when Archbishop Gebhard of Salzburg transferred property at Strechowe to Admont Abbey; the first defensive tower on the hill is dated to the mid-11th century. From 1529 Hans Hofmann of Grünbühel rebuilt the decayed castle as a Renaissance residence, and his son Hans Friedrich continued the work. In 1629 the castle passed to Admont Abbey, which held it until 1892.

The castle's former Protestant chapel has ceiling paintings from 1579 whose theological programme was devised by the theologian David Chyträus. In the second floor of the east wing, the festival hall ceiling shows scenes from Ovid's Metamorphoses in stucco and oil painting dated 1652. The small Marian chapel in the south wing holds a baroque altar of 1637 attributed to the Admont sculptor Georg Remele, with a Madonna and Child flanked by Saints Barbara and Catherine.

The castle stands on a rocky hill in the Burgfried part of Lassing; the entrance leads through the gate in the former bastion, above which sits a defensive oriel. Behind the three oval openings of the bastion once stood cannon. The long outer courtyard is lined by former stables, utility buildings, a powder magazine and the steward's house.

Since May 2006 the castle has housed an exhibition of vintage cars, open to visitors alongside the historic rooms. The collection is a private one, kept by the Boesch family foundation that bought the neglected, almost empty castle in 1979 and has renovated it since.