Philipp-Melanchthon-Kirche, Protestant church building in Alten, Germany

Philipp-Melanchthon-Kirche is a red-brick church with a Greek-cross plan and a 32-metre octagonal crossing tower topped by a pointed spire. Built in Neo-Romanesque style, it has large rose windows with stepped gables facing all four directions, a square clock tower, and a cylindrical turret with narrow windows.

The predecessor church, an oval building without a tower, was consecrated by Prince Leopold I on 29 December 1743 as thanks for his wife's recovery, possibly to designs by Carlo Ignazio Pozzi. Restored in 1843, it was dilapidated by around 1890, so a new church by ducal building official Gustav Teichmüller was completed in 1898, reportedly with support from Duke Friedrich I. It was thoroughly renovated in 1991 and 1992.

The church is named after Philipp Melanchthon, the Wittenberg reformer, and its interior shows the Reformation figures important to Anhalt: paintings of Martin Luther, Melanchthon and Prince Georg I above the gallery supports. In the chancel, Nazarene-style wall paintings depict biblical figures from the Old and New Testaments, with biblical symbols in the vault.

The church stands in the middle of Alten, its 32-metre tower visible from the surrounding streets. The 1991–92 renovation added glass walls that separate the entrance area and create two community rooms beneath the side galleries. The organ, Rühlmann's 199th work from 1898, is preserved but awaits restoration.

The 1898 organ by Wilhelm Rühlmann of Zörbig is the 199th work of his workshop and survives fully original, with pneumatic action and box windchests. Its free-pipe front stands almost unchanged on the gallery; the instrument currently awaits restoration.