The 29-year-old Formula 1 racer shared a pic of himself and Scherzinger, whom he called 'wifey', touring the Sistine Chapel on his Instagram page, reported E!Online.
"This was a great day.... Truly humbled by the Sistine Chapel plus there with my wifey," he wrote.
The 35-year-old former Pussycat Dolls singer sported pants and a dark jacket with a beanie, whereas, Hamilton donned jeans, a shirt and a black jacket with a beanie.
Earlier this year, Scherzinger and Hamilton reignited romance rumors when they were spotted on a dinner date together in LA.