Port-de-Trolan was a Dhakaani city 10,000 years ago, but the Gnomes built the metropolis that has become their capital on its foundations when the wars with the Daelkyr caused a depopulation of the Hobgobelins of the region.

The port city is designed on a canal system and is the center for gnomish shipbuilding of both the naval and aerial variety.

Port-de-Trolan is a centre of trade for Khorvaire and one of the major departure ports for Xen'Drik, Aérénal and Sarlona. It is said almost anything can be found in the markets, from Sarlonan tapestries, to Karrnathi blades and incense from distant Seren islands.

While all the Houses have a presence in this important city, Maison Kundarak, Maison Siri and Maison Bombardier have major enclaves in the gnomish capital. The Maison Bombardier operation is under the direction of Bombardier Sud, whose baron, Merrix de Bombardier, resides in Sharn.