Krönchen, Iron weather vane and sculpture in Siegen, Germany.

The Krönchen is an iron crown-shaped weather vane mounted on the Nikolaikirche tower in central Siegen. The piece displays skilled ironwork and sits prominently above the marketplace and surrounding streets.

The Krönchen was a gift from Prince Johann Moritz of Nassau-Siegen to the city, made to mark his elevation to princely rank in 1652. The three smiths Gerlach Burchmann, Jakob Schleifenbaum and Johannes Pickardt forged it at the Hammer vor der Hardt in Weidenau at the prince's expense, and it was placed on the Nikolaikirche tower in 1658. In 1993 a gilded stainless-steel replica replaced the weathered original, which is now displayed inside the tower.

The crown was a gift from Prince Johann Moritz of Nassau-Siegen, who had used the crown as his monogram since before becoming Dutch governor-general in Brazil, where it appeared on provincial coats of arms to mark claims over land and inhabitants. Siegen is informally called Krönchenstadt, and the original crown hangs in the church tower's portal area.

The original 17th-century crown, parts of the copper sphere destroyed in 1992 and the bent mast are displayed in the portal area inside the Nikolaikirche tower. The replica sits on the tower helm above; the weather arrow turns on a bearing of 19 agate balls.

The original 17th-century crown, removed in 1992 after a storm bent its seven-metre mast, now hangs inside the Nikolaikirche tower portal. Fragments of the destroyed copper sphere and the bent mast are displayed beside it.