Question: what's that symbol on the patriots field

title: Gillette Stadium
text: Coordinates 42 ° 05 ′ 27.40 '' N 71 ° 15 ′ 51.64 '' W ﻿ / ﻿ 42.0909444 ° N 71.2643444 ° W ﻿ / 42.0909444 ; - 71.2643444 Coordinates : 42 ° 05 ′ 27.40 '' N 71 ° 15 ′ 51.64 '' W ﻿ / ﻿ 42.0909444 ° N 71.2643444 ° W ﻿ / 42.0909444 ; - 71.2643444