The King and Queen of Spain attended an institutional ceremony today marking the capitulations of Valladolid within the framework of 500th anniversary of the Earth's first circumnavigation by Portuguese explorer Fernando de Magallanes who organised the Spanish expedition in 1519.

Queen Letizia looked resplendent in red wearing a two-piece suit by Spanish fashion designer Roberto Torretta. It features blazer with a wide notched lapel and illusion vest closure, and boot cut trousers with a slit at the hem.

The set is from the designer's Fall/Winter 2017/18 collection and marks the first piece Her Majesty has worn by the eponymous label. Born in Buenos Aires, Roberto Torretta moved to Madrid in 1972 to get acquainted with the fashion world. After decades working for other fashion houses he went solo in 1997. At present, his lines are divided into prêt-a-porter women's wear, which is presented every season on the catwalk in Madrid, a night collection and another collection of bridal gowns. ​

Letizia teamed the pant suit with her Carolina Herrera 'Maysa' clutch bag and a new pair of bespoke red suede pumps by Magrit. 

On her way into the Monastery of Our Lady of Prado for the ceremony, Her Majesty rugged up in her winter white belted coat which dates back to November 2010 and a matching scarf.

Letizia finished the outfit with her​ Gold & Roses Double Dagger Earrings (€2,125).

Queen Letizia attended a meeting today with the Integra Foundation - a charity that supports people with disabilities to improve their wellbeing through job placement.

Her Majesty also toured the facilities during her visit to the organization's headquarters in Madrid.

The Spanish Queen stepped out in a new navy blue wool coat featuring a bouclé drop waist hem giving the illusion of a miniskirt. The piece is by CH Carolina Herrera from the designer's Fall 2015 collection. It is fashioned with a round neckline and fringe trim detail.

The runway design shown in the photo above has a fringe trim down the front and collar but the off-the-rack version which is identical to Letizia's (shown in the photo below) does not have this extra fringe detail.  This listing on RealReal.com classifies the piece as a mini dress. The exposed full zip down the front adds versatility to the design which means it can be worn as a coat or on its own as a dress.

Letizia teamed the garment with her blue Uterque leather leggings which she first wore at last year's Easter Sunday service.

She cooridanted the outfit with her navy CH Carolina Herrera 'Baret' flap clutch bag and classic Magrit leather pumps.

Letizia finished the look with her dainty Chanel Comète Earrings.

Queen Letizia went backstage today at Spain's major opera house, Teatro Real for a firsthand look at the workshops where stage sets and costumes are created.

She stepped out in black slim trousers and her Zara Military Jacket which we first saw her wear in November 2016 for the final engagement during the State visit to Portugal.  It is a cotton jacket with a raised velvet collar and passementerie detail on the front and sleeves. It is finished with gold-toned buttons on the front and velvet-covered cuffs. Unfortunately the piece has long sold out.

Letizia offset the military style with her soft white Hugo Boss 'Banora' silk blouse (£169). This staple design is still available at Hugo Boss UK in limited sizes.

Her Majesty arrived at the theatre wearing a combination she debuted earlier this year for a board meeting with Fundéu BBVA.  It consists of a black wool trench-style coat (brand unknown), and her black Hugo Boss 'Fanila' clutch and Hugo Boss 'Lula' ankle boots.

She topped of the look with her Bimba Y Lola gold hammered-effect hoop earrings.

Queen Letizia presided over a ceremony at the Goya Theater in Madrid today to mark World Rare Disease Day.

She delivered a speech in her role as honorary president of the Spanish Federation For Rare Diseases. ​Letizia emphasized the importance of scientific research in the search for cures, and acknowledged individuals and organizations who support people with rare diseases.

During the ceremony, Her Majesty presented the annual awards to persons and entities who work to support people with rare diseases.

Letizia looked smart and polished in tweed separates from her go-to brand, Hugo Boss.  She coordinated the BOSS 'Keili Jacket (£380) with the matching 'Meili' Skirt (£169). Both pieces are tailored from rich Italian tweed and feature sleek leather piping which gives the classic suit an edgier look.

She teamed the set with a white blouse featuring asymmetrical pleats at the neckline. I assume it's by Hugo Boss and I'll update the post if I find it in their inventory.

Letizia accessorised with her black Uterque studded messenger bag and Prada saffiano pumps. ​

She rounded out the look with her TOUS cultured freshwater pearl drop earrings.

The professional elegance of today's outfit was consistent with Letizia's previous sartorial choices for this event. Do you have a favorite?

The Queen of Spain welcomed audiences at the Palace of Zarzuela today and opted to repeat an outfit she wore in January for her first audience of 2018.

The ensemble consists of soft white pintuck blouse and ​taupe paperbag-waist cropped trousers. The brand(s) of the two pieces are still unknown.

On her feet Letizia wore her camel Hugo Boss block-heel pumps.

A familiar pair of gold filigree hoop earrings topped off the look.

The King and Queen of Spain held an audience with the Spanish athletes who participated in this year's Winter Olympic Games in PyeongChang.

Queen Letizia looked like she was part of the squad wearing the national team colours of white and red.

We saw the return of her season-favorite red suede boots by Magrit, and the patterned Carolina Herrera skirt which Letizia first for a meeting with the Spanish Association Against Cancer (AECC) last December.

Today she teamed it with a new winter white turtleneck top. It is the Hugo Boss 'Iddyana' knit jumper from the BOSS Orange line. Originally retailing for £94.99, it has now been reduced to £71.24 at Zalando.

Letizia completed the ensemble with her TOUS cultured freshwater pearl drop earrings.

Queen Letizia was in Santiago on Friday to promote "Digitalizadas" - a program that aims to encourage digital literacy of women living in rural areas in Spain.

Her Majesty channeled vintage glamour in a petrol blue tea dress by Italian luxury brand Bottega Veneta as she attended the tech event at the city's Reyes Catolicos Hotel.

Cut from crepe fabric in an ultra-feminine V-neck silhouette, this chic lightweight dress is embroidered with black butterfly motifs – a hallmark of the fashion house, and a leading detail in Bottega Veneta's Resort 2018 collection.  Ruched shoulders, ruffles and sewn pleats at the waist lend a subtle romantic edge. The US$2,460 dress is currently available at Bottega Veneta, Matches Fashion, Orchard Mile and Neiman Marcus.

Letizia complemented the pretty dress with her dainty Elena C mini butterfly earrings.

She accessoried with her black Felipe Varela leather chevron quilted envelope clutch and Prada saffiano pumps. 

Following the event, Queen Letizia exited wearing a black wool coat we have not seen her don before.

The new piece is the Carolina Herrera A-Line Belted Coat (£3,670), crafted from stretch virgin wool and featuring notched lapels, a double breasted front fastening, a belted waist, and side flap pockets.