| Mount Auxentius | |
| Other Name: | Mount St. Auxentius Kayış Dağı |
| Elevation M: | 428 |
| Coordinates: | 40.9708°N 29.1642°W |
| Location: | Istanbul |
| Country: | Turkey |
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| State18: | --> |
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Mount Auxentius (also known as Mount St. Auxentius, Mount Auxentios, or Mount Scopas), today known as Kayış Dağı in Turkish, is a mountain located in the eastern outskirts of Istanbul, Turkey, in Kayışdağı neighborhood. Its summit is 428 metres above sea level.[1] The mountain is named after Auxentius of Bithynia.
The mountain was home to Christian monks and ascetics during the Byzantine period.[2] Byzantine Christian monks who lived on the mountain included Saint Stephen the New (713–764)[3] and Saint Macarius of Mount Auxentius (died 768).[4]