**In 1661, the King of Portugal gifted the islands to King Charles II of England when he married the Portuguese princess, Catherine of Braganza. The Portuguese authorities in India, however, refused to deliver the islands of Salsette, Mazagaon, Varli and Parel, which the English claimed as part of the marriage treaty.
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The evidence of the marriage treaty was the dowry map, in which it was mentioned that ‘the English King was to receive the port and island of Bombay in the East Indies, with all the rights, territories, and appurtenances whatsoever there unto belonging; and together with the income and revenue, the direct, full and absolute domination and sovereignty of the said port, island and premises’. **
Interesting 
Are there any other instances in history, where states and cities changed ownership due to marriages and dowries?
he got right to rule over Pakistan