- Quién
- GIANLUIGI DE MARCHI
- Qué
- 12 total number
- Dónde
- Italia (Pino Torinese)
- Cuándo
The most letters to the editor's published in one week (multiple newspapers) is 12, achieved by Gianluigi De Marchi (Italy) in Pino Torinese, Italy, from 11 to 18 December 2022.
Gianluigi is the first holder of this title.