Kieler Frieden
Tranquebar was occupied by the British in February 1808 during the Napoleonic Wars but was restored to Denmark following the Treaty of Kiel in 1814. Along with the Danish settlement of Serampore in Bengal, it was sold to the British in 1845. Tranquebar was then still a busy port, but it later lost its importance after a railway was opened to Nagapattinam.