Chang'an

• (from Wade–Giles) Ch'ang-an
• Changan

From the Hanyu Pinyin romanization of the Mandarin Chinese pronunciation for 長安／长安 (cháng'ān).

• IPA^(key): /ˈt͡ʃɑŋˌɑn/, /ˈt͡ʃæŋˌæn/

Chang'an

1. An ancient capital of various Chinese empires, located within present-day Xi'an.
   • 2020 September 29, The Information Office of Xi'an Municipal Government, “Spellbinding Xi`an: Where Ancient and Modern Collide”, in Reuters‎, archived from the original on 11 November 2020, Paid Content:

     At the height of its prominence during the Tang dynasty (618-907), Xi’an, then known as Chang’an, was one of the world’s largest and most populous cities, although its history actually stretches back more than 6,500 years to the Neolithic period. […]
     Since Han dynasty diplomat Zhang Qian blazed a trail westward from Chang’an more than 2,000 years ago, trade and traditions from around the world have flowed along the Silk Road, shaping Xi’an’s uniquely cosmopolitan culture.

2. A district and former county of Xi'an, Shaanxi, China.

• Chang'an Avenue