flower power! Queen Letizia of Spain impresses in a black floral dress as she attends the opening of the Royal Collections Gallery in Madrid alongside King Felipe

Queen Letizia of Spain exuded effortless glamor as she attended the opening of the new Royal Collections Gallery in Madrid tonight.

The 50-year-old European royal looked sensational in a black and white floral midi dress for the occasion.

The mother-of-two’s stunning 1960s-inspired dress featured a black silk belt and an elegant bow detail.

In addition to a wide skirt, the elegant dress also had a tight-fitting top and thick black straps.

The queen paired her stunning gown with simple black heels and a matching silk clutch bag.

Queen Letizia of Spain oozed Hollywood glamor in a voluminous black floral dress tonight

Additionally, Letizia styled her shoulder-length brown hair in Hollywood waves for her visit to the Royal Collections Gallery.

The queen opted for her signature bronze makeup and brown smoky eyes, which she paired with a nude lipstick.

The Queen kept her jewelry to a minimum, opting for a pair of diamond-studded silver hoop earrings.

Meanwhile, King Felipe, 55, looked dapper in a navy pinstriped suit at the gallery opening.

The monarch paired his suit with a white shirt, dark blue and red printed tie and black patent leather shoes.

The Royal Collections Gallery – which officially opens tonight – is now one of the largest museums in Europe and was designed by architects Emilio Tuñón and Luis Moreno Mansilla.

Hundreds of medieval works of art and artifacts belonging to the Spanish Crown are on display.

The idea for the museum, which cost 170 million euros, was first proposed in 1935 – but postponed due to the civil war.

Queen Letizia styled her shoulder length brown hair in Hollywood waves and completed her outfit with a black silk bag and belt

The Queen kept her jewelry to a minimum, opting for a pair of diamond-studded silver hoop earrings

The building expands the area by 8,000 square meters and the exhibition space on six floors.

Earlier this month, King Felipe traveled to London to watch Spanish player Carlos Alcaraz defeat Novak Djokovic in the Wimbledon men’s singles final.

The 55-year-old Spanish monarch appeared delighted as the 20-year-old took Center Court by storm, winning his first Wimbledon title and remaining world number one.

After the game, the Spaniard Alcaraz joked that King Felipe was his lucky charm: “It’s something special to play in front of kings.”

“King Felipe, I am really proud that you are here and supporting me.”

“When I played in front of you twice, twice I won, I hope you come more often!” It’s really special and I have to thank you for coming and for your support.”