There was a piece of British territory inside Kollam, and it had a customs post

Thangassery today is a headland on the edge of Kollam with a lighthouse, a ruined fort, some old cemeteries and a Catholic cathedral. For a century and a half it was something considerably stranger: a piece of British India, under direct British sovereignty, entirely surrounded on its landward sides by the princely state of Travancore. Ninety-nine acres of it. Under four tenths of a square kilometre.

How it got there

The Portuguese arrived in 1502 and leased the ground from the queen of Quilon; the fort — St Thomas Fort — went up in 1519. The Dutch took it in 1658, lost some of it, and retook it in 1661, after which British administrators referred to the place as Dutch Quilon, a name that outlasted the Dutch. On 20 October 1795 the East India Company assumed control.

The decisive thing is what happened next, and it is the part that makes this unusual rather than merely old. The British did not fold Thangassery into Travancore. They kept it, as sovereign territory, and administered it from a distance — attached first to the Anjengo district and later to the Malabar district of the Madras Presidency, hundreds of kilometres up the coast. So the strip of seafront was governed from Madras while the street behind it was governed from Thiruvananthapuram.

A frontier you could walk across without noticing

The consequence people forget is the customs. Two jurisdictions meeting on a residential headland means duties, and the Thangassery arch — which still stands, and has had renovation attention in recent years — worked as a customs check-post and border gateway. It is a very ordinary-looking arch. It marked an international frontier inside what is now one Indian city.

There is a similar story a little further up the same coast at Anjengo, which is the district Thangassery was first attached to. The Malabar coast was, for a long stretch of the colonial period, a patchwork rather than a map — a princely state with holes in it, each hole answering to somebody else.

The community the arrangement produced

Three European powers in succession, each of them present for generations and each marrying locally, produced an Anglo-Indian community that made Thangassery its home and largely still defines the place culturally, even though very little of the population remains. That is the honest state of it: a distinct community, much reduced, in a quarter whose distinctiveness is now mostly architectural and denominational rather than demographic.

The transfer of the enclave to Travancore is the one date we cannot give you. The sources we can check are clear about how the British acquired it and clear that it was later merged, and none of them we have found states plainly when. We would rather leave the gap visible than fill it with a year we cannot support.

Going there

It is about three kilometres from the middle of Kollam and takes ten minutes, which is the argument for going: an entire colonial frontier, a fort, two cemeteries and a lighthouse inside a short auto ride of a working Indian town centre. Go late in the afternoon, walk the headland rather than driving between the points, and read the fort as what it is — a ruin nobody has tidied, standing in a neighbourhood, with washing lines nearby.