| Clue | Source | Date |
|---|---|---|
| Finnish-born American architect who designed the Gateway Arch in St Louis | The Telegraph General Knowledge | 13 Sep 2021 |
| Dulles designer | New York Times | 28 Oct 2018 |
| Dulles designer | ||
| Gateway Arch architect | ||
| Gateway Arch designer | ||
| Architect who designed MIT's Kresge Auditorium | ||
| St. Louis Gateway Arch architect | ||
| Dulles Airport designer | ||
| Dulles designer | ||
| Washington Dulles International Airport architect |