| Honorific-Prefix: | Blessed |
| Niels Steensen | |
| Term End: | 5 December 1686 |
| Other Post: | Titular Bishop of Titiopolis |
| Ordination: | 13 April 1675 |
| Consecration: | 19 September 1677 |
| Consecrated By: | Saint Gregorio Barbarigo[1] |
| Birth Name: | Niels Steensen |
| Birth Date: | 1 January 1638 |
| Death Date: | |
| Buried: | Basilica of San Lorenzo, Italy |
| Nationality: | Danish |
| Religion: | Roman Catholic |
| Coat Of Arms: | Coat of arms of Nicolas Steno.svg |
| Coat Of Arms Alt: | Coat of arms of Bishop Nicolas Steno. The cross symbolizes faith and the heart, the natural sciences. |
| Feast Day: | 5 December |
| Venerated: | Roman Catholic Church |
| Beatified Date: | 23 October 1988 |
| Beatified Place: | Rome, Vatican City |
Niels Steensen (Danish: Niels Steensen; Latinized to Nicolas Steno or Nicolaus Stenonius); 1 January 1638 – 25 November 1686[2]