Sanahin Bridge, Medieval bridge in Alaverdi, Armenia.

The Sanahin Bridge is a medieval structure that crosses the Debed River with a single arch of polished basalt stones. The construction spans approximately 19 meters and measures about 3 meters wide, connecting two sections of Alaverdi separated by a canyon.

Queen Vaneni, sister of the Zakarian brothers Ivane and Zakare, ordered the bridge built in 1192 in memory of her husband, King Abbas II of the Kyurikid line. A khachkar inscription near the riverbank records her grief and the gift to Sanahin Monastery. In 1795 Agha Mohammad Khan's raiders destroyed the part of the inscribed khachkar bearing the construction date. Repairs followed in 1888, 1928–29 under Alexander Tamanyan, and in 1939–40 and 1976–77.

The bridge is named after the monastery of Sanahin, whose stairway up the slope begins directly behind it. Its parapet walls carry stylised lion reliefs in carved stone, and the crossing is linked to the nearby riverside khatchkar whose inscription records Queen Vaneni's order of 1192. Some Georgian tourism platforms attribute the bridge to Queen Tamar instead of Vaneni.

The bridge connects two sections of town across a deep canyon, with the left bank positioned much lower than the right bank. Visitors should be aware that ground levels differ significantly at both approaches, so caution is advisable when entering.

Alexander Tamanyan, architect of Yerevan's first general plan, oversaw reinforcement of the bridge's left foundation between 1928 and 1929. His intervention allowed the aging structure to regain stability and continue serving its purpose.