Ankara headquarters of the Turkish Aerospace Industries, MKE, ASELSAN, Havelsan, Roketsan, FNSS, Nurol Makina, and numerous other firms are located. Exports to foreign countries from these defence and aerospace firms have steadily increased in the past decades. The IDEF in Ankara is one of the largest international expositions of the global arms industry. A number of the global automotive companies also have production facilities in Ankara, such as the German bus and truck manufacturer MAN SE. Ankara hosts the OSTIM Industrial Zone, Turkey's largest industrial park. A large percentage of the complicated employment in Ankara is provided by the state institutions;
History of Ankara end of the 4th century, St. Jerome, a native of Galatia, observed that the language spoken around Ankara was very similar to that being spoken in the northwest of the Roman world near Trier. This may indicate that the older Phyrigian population had adopted the language of the Celtic invaders. The city was subsequently conquered by Augustus in 25 BC and passed under the control of the Roman Empire. Now the capital city of the Roman province of Galatia, Ancyra continued to be a center of great commercial importance. Ankara is also famous for the "Monumentum Ancyranum" ("Temple of Augustus