Definition of "architected"

Last, but very much not least, are the portals of the Ffestiniog Railway's Moelwyn Tunnel. The tunnel's story itself is well told - it was part of the preservationists' deviation required to get around a reservoir that had flooded the earlier route. But the reason for its inclusion here is that it is probably the most recently constructed, properly architected tunnel portal in Britain.

2020 August 26, Tim Dunn, “Great railway bores of our time!”, in Rail, pages 48–49