Troparion Tone 4
Today, like the eternal sun, / Your Icon appears in the sky, O Theotokos. / With rays of mercy it enlightens the world. / This land accepts the heavenly gift from above, / Honoring You as the Mother of God. / We praise Christ our Lord who was born of You. / Pray to Him, O Queen and sovereign virgin / That all Christian cities and lands be guarded in safety, And that He save those who kneel to His divine, and Your holy image, O unwedded bride.
Kontakion Tone 8
O people, let us come to the Virgin Queen and Mother, giving thanks to Christ God. / Let us fall before her miraculous image, and let us cry: / O sovereign Mary, your glorious image now inhabits this land. / Save all the Christians of this world, showing us the heavenly life. / To You we faithfully cry: Rejoice, O Virgin, the salvation of the world!
From the OCA website:
According to ancient tradition, the wonderworking icon of Tikhvin is one of several painted by St Luke the Evangelist. The icon was taken from Jerusalem to Constantinople in the fifth century, where it was enshrined in the Church of Blachernae, which was built especially for this purpose.