Please answer the following question: Information:  - Maria Theresa Walburga Amalia Christina (; 13 May 1717  29 November 1780) was the only female ruler of the Habsburg dominions and the last of the House of Habsburg. She was the sovereign of Austria, Hungary, Croatia, Bohemia, Transylvania, Mantua, Milan, Lodomeria and Galicia, the Austrian Netherlands and Parma. By marriage, she was Duchess of Lorraine, Grand Duchess of Tuscany and Holy Roman Empress.  - Maria Christina , Duchess of Teschen ( Maria Christina Johanna Josepha Antonia ; 13 May 1742 -- 24 June 1798 ) , called `` Mimi '' , was the fourth daughter and fifth child of Maria Theresa of Austria and Francis I , Holy Roman Emperor . She was Governor of the Austrian Netherlands from 1781 until 1793 . She was an older sister of Marie Antoinette .  - Francis I (; 8 December 1708  18 August 1765) was Holy Roman Emperor and Grand Duke of Tuscany, though his wife effectively executed the real powers of those positions. With his wife, Maria Theresa, he was the founder of the Habsburg-Lorraine dynasty. From 1728 until 1737 he was Duke of Lorraine. In 1737, Lorraine became managed by France under terms resulting from the War of the Polish Succession. Francis and the House of Lorraine received the Grand Duchy of Tuscany in the peace treaty that ended that war. After taking the throne of the Holy Roman Empire, the return of the ancestral duchy of Lorraine went nominally to his brother Prince Charles Alexander of Lorraine (who was however engaged in ruling the Austrian Netherlands), until succession under derivate house alliances resulted in Lorraine's annexation to France in 1766.    What is the relationship between 'maria christina' and 'house of habsburg'?
A:
noble family