
Saint Xenia lived during the eighteenth century, but little is known of her life  or of her family. She passed most of her life in Petersburg during the reigns of  the empresses Elizabeth and Catherine II.
Xenia Grigorievna Petrova was  the wife of an army officer, Major Andrew Petrov. After the wedding, the couple  lived in St Petersburg. St Xenia became a widow at the age of twenty-six when  her husband suddenly died at a party. She grieved for the loss of her husband,  and especially because he died without Confession or Holy Communion. 
Once her earthly happiness ended, she did not look for it again. From  that time forward, Xenia lost interest in the things of this world, and followed  the difficult path of foolishness for the sake of Christ. The basis for this  strange way of life is to be found in the first Epistle to the Corinthians (1  Cor. 1:18-24, 1 Cor. 2:14, 1 Cor. 3:18-19). The Lord strengthened her and helped  her to bear sorrow and misfortune patiently for the next forty-five years. 
She started wearing her husband's clothing, and insisted that she be  addressed as "Andrew Feodorovich." She told people that it was she, and not her  husband, who had died. In a certain sense, this was perfectly true. She  abandoned her former way of life and experienced a spiritual rebirth. When she  gave away her house and possessions to the poor, her relatives complained to the  authorities. After speaking to Xenia, the officials were conviced that she was  in her right mind and was entitled to dispose of her property as she saw fit.  Soon she had nothing left for herself, so she wandered through the poor section  of Petersburg with no place to lay her head. She refused all assistance from her  relatives, happy to be free of worldly attachments.
When her late  husband's red and green uniform wore out, she clothed herself in rags of those  colors. After a while, Xenia left Petersburg for eight years. It is believed  that she visited holy Elders and ascetics throughout Russia seeking instruction  in the spiritual life. She may have visited St Theodore of Sanaxar (February  19), who had been a military man himself. His life changed dramatically when a  young officer died at a drinking party. Perhaps this officer was St Xenia's  husband. In any case, she knew St Theodore and profited from his instructions. 
St Xenia eventually returned to the poor section of Petersburg, where  she was mocked and insulted because of her strange behavior. When she did accept  money from people it was only small amounts, which she used to help the poor.  She spent her nights praying without sleep in a field outside the city. Prayer  strengthened her, and in her heart's conversation with the Lord she found the  support she needed on her difficult path.
When a new church was being  built in the Smolensk cemetery, St Xenia brought bricks to the site. She did  this in secret, during the night, so that no one would know.
Soon her  great virtue and spiritual gifts began to be noticed. She prophesied future  events affecting the citizens of Petersburg, and even the royal family. Against  her will, she became known as someone pleasing to God, and nearly everyone loved  her.They said, "Xenia does not belong to this world, she belongs to God." People  regarded her visits to their homes or shops as a great blessing. St Xenia loved  children, and mothers rejoiced when the childless widow would stand and pray  over a baby's crib, or kiss a child. They believed that the blessed one's kiss  would bring that child good fortune.
St Xenia lived about forty-five  years after the death of her husband, and departed to the Lord at the age of  seventy-one. The exact date and circumstances of her death are not known, but it  probably took place at the end of the eighteenth century. She was buried in the  Smolensk cemetery.
By the 1820s, people flocked to her grave to pray for  her soul, and to ask her to intercede with God for them. So many visitors took  earth from her grave that it had to be replaced every year. Later, a chapel was  built over her grave.
Those who turn to St Xenia in prayer receive  healing from illness, and deliverance from their afflictions. She is also known  for helping people who seeking employment.
   Troparion - Tone 8
  In you, O mother was  carefully preserved what is according to the image. For you took up the Cross  and followed Christ. By so doing, you taught us to disregard the flesh for it  passes away, But to care instead for the soul since it is  immortal. Therefore, O Blessed Xenia, your spirit rejoices with the  Angels.
  Kontakion - Tone 7
  Having loved  the poverty of Christ, You are now being satisfied at the Immortal  Banquet. By the humility of the Cross, you received the power of  God. Having acquired the gift of miraculous help, O Blessed Xenia, Beseech  Christ God, that by repentance We may be delivered from every evil  thing.
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From the website of the Orthodox Church in America.