The Armenian Cathedral of the Assumption of Mary (Armenian: Հայկական տաճար; Ukrainian: Вірменський собор, romanized: Virmenskyi sobor; Polish: Katedra ormiańska) in Lviv, Ukraine is located in the city's Old Town, north of the market square.

Established as the mother church of an eparchy, it was modelled on the Cathedral of Ani, the ancient Armenian capital.

In 1437, the cathedral was surrounded with an arcade gallery; the southern part is preserved, and the northern portion has been rebuilt into a sacristy.

In 1945, the new Soviet authorities abolished the Armenian Catholic Archdiocese of Lviv, and arrested its administrator, Dionizy Kajetanowicz.

[1] After the collapse of the Soviet Union, Armenian Catholic families attempted to re-establish the parish.

The cathedral holds two wonder-working icons of St. Gregory the Illuminator and the Mother of God, brought in the 17th century from Yazlovets.