The Duke and Duchess of Edinburgh travelled in style through the city of Lisbon yesterday as they boarded a yellow tram for the first day of their Portuguese visit.Prince Edward and Sophie undertook several engagements across the capital for the start of their three-day trip to mark the 640th anniversary of the historic Treaty of Windsor, which cemented the Anglo-Portuguese partnership. To begin their second day of engagements, Sophie delivered a powerful speech to students taking part in Model NATO in Lisbon, dressed in a stylish white suit jacket and green and white dress. The British Embassy Lisbon initiative seeks to replicate a high-level meeting of NATO's North Atlantic Treaty for students from Birmingham University alongside six Portuguese universities. On Monday, the royal couple formally opened an exhibition dedicated to the Treaty of Windsor at the Portuguese National Archive, which will see copies of the original document displayed together for the very first time in their 630-year history.'You look after your documents better than we do,' quipped Edward, while Sophie remarked to staff that the copies of the treaty contained incredibly 'small' handwriting. For the marked occasion, Sophie, 61, stepped out in a striking silk summer dress from Suzannah London, known as the 'Veronique', featuring a soft green clover print. From there, Edward, 62, and Sophie travelled around Lisbon in style - boarding a historic yellow tram to travel through the city centre following a walk through Estrela Garden with the Mayor of Lisbon, Carlos Moedas. Showcasing his impressive Portuguese skills, Edward left onlookers amazed when he disembarked the tram and remarked 'obrigado', which translates to 'thank you'.For their final engagement of the day, the Duke and Duchess of Edinburgh hosted a lavish garden party at the UK Ambassador's Residence where they met with charity leaders and representatives with connections to both the UK and Portugal.Yet the real star of the show was Sophie's impeccable backless red dress - the 'Strawberry Date Dress' by Materlier Design, which she paired with striking earrings from Guila Barela and Penelope Chilvers platform sandals in burgundy. An influx of royal fans have praised the Duchess of Edinburgh's impeccable backless red dress - the 'Strawberry Date Dress' by Materlier Design - which she wore for a garden party in Lisbon yesterday One royal fan wrote: 'I don't call her Sunshine Sophie without a reason,', while others described the Duchess as 'exquisite' and 'regal' The Duke and Duchess of Edinburgh travelled in style through the city of Lisbon yesterday as they boarded a yellow tram for the first day of their Portuguese visit Prince Edward and Sophie undertook several engagements across the capital for their three-day trip to mark the 640th anniversary of the historic Treaty of Windsor, which cemented the Anglo-Portuguese partnershipFor the marked occasion, Sophie, 61, stepped out in a striking silk summer dress from Suzannah London , known as the 'Veronique', featuring a soft green clover print'Can we take a moment to say how stunning The Duchess of Edinburgh looks tonight?,' praised one royal fan, while anther added: 'Seriously giving me Downtown Abbey vibes. Her hair is spot on perfection. Great look'.'I don't call her Sunshine Sophie without a reason,' added one onlooker, while others described the Duchess as 'exquisite' and 'regal'. Edward and Sophie's visit to Portugal marks the first royal visit to the country since 2011 and will see the royal cuple carry out engagements in both Lisbon and Porto. Throughout the visit, the pair will focus upon celebrating and strengthening ties between the two nations, while also celebrating shared history and values spanning sport inclusion and Women, Peace and Security. It comes just weeks after it was revealed that the couple's daughter, Lady Louise Windsor, had accepted a 'paid job' at the Royal Windsor Horse Show, with officials praising the 'hard-working' royal as a 'real asset' to the team. Lady Louise, 22, who is studying English at the University of St Andrew's, seemed unfazed by the cold rain in Berkshire as she arrived for the prestigious equestrian event.King Charles's niece, who is one of the chief organisers of the event, wore a Joules Tweed Field Coat in a heather check pattern and showed her support with a 'RWHS' cap over her flowing blonde tresses. To begin their second day of engagements, Sophie delivered a powerful speech to students taking part in Model NATO in Lisbon, dressed in a stylish white suit jacket and green and white dress Sophie met with students who are involved in the British Embassy Lisbon initiative which seeks to replicate a high-level meeting of NATO's North Atlantic Treaty For their final engagement of the day, the Duke and Duchess of Edinburgh hosted a lavish garden party at the UK Ambassador's Residence A beaming Sophie was a vision in red for the first day of her and Prince Edward's Portuguese visit She finished her look with a pair of navy trousers tucked into a pair of Wellington boots with a beige leather strap.She was joined by her parents, the Duke and Duchess of Edinburgh as they kicked off the first day of the show ahead of King Charles's attendance.Sophie beamed with pride as she watched her daughter help out with preparations, after the director of the Royal Windsor Horse Show praised Lady Louise as a 'great worker' who doesn't have any 'airs or graces'.The Duchess was typically elegant in a beige tweed jacket, dark brown trousers, and an off-white scarf as she bundled up on the cold May afternoon.The following day, Sophie and Lady Louise proved to be a stylish duo as they were joined by Prince Edward, who was briefly captured draping a fashionable waterproof windbreaker over her jacket.According to Nick Brooks-Ward, the director of the event, the down-to-earth royal is operating a 'first concierge service'.He told Vanity Fair: 'Lady Louise is one of the chief organizers, essentially operating a first concierge service. She’s a great worker and a real asset to the team with no airs or graces. It’s a proper paid job and there’s no special treatment because of who she is.'The royal was taught to carriage drive as a young girl by her grandfather, the late Prince Philip, and the pair are said to have bonded over a shared love of the sport.The late Duke of Edinburgh counted the activity as one of his favourite pastimes. In the 1970s, Philip raced carriages near Norfolk before going on to represent Britain at several world and European championships. 'Can we take a moment to say how stunning The Duchess of Edinburgh looks tonight?,' praised one royal fan, while anther added: 'Seriously giving me Downtown Abbey vibes. Her hair is spot on perfection. Great look' Edward and Sophie walked through Estrela Garden with the Mayor of Lisbon, Carlos Moedas during the first day of their Portugal visit On Monday, the royal couple formally opened an exhibition dedicated to the Treaty of Windsor at the Portuguese National Archive, which will see copies of the original document displayed together for the very first time in their 630-year historyIn a heartfelt tribute to her grandfather, Lady Louise drove his carriage during an emotional procession at the finale of the 'Gallop Through History' during Queen Elizabeth's Platinum Jubilee celebrations in May 2022.Lady Louise now frequently partakes in equestrian competitions and has driven her beloved grandfather's ponies as a way to keep his memory alive.Meanwhile, her mother Sophie has devoted much of her latter royal work to raising awareness of the issue of sexual violence, and in February embarked on a two-day Kenyan tour to highlight the role of women in peacebuilding and conflict resolution.In April 2024, Sophie bravely denounced Putin's forces for using rape as weapon of war as she became the first British royal to visit Ukraine since Russia's invasion in February 2022.In October, the royal visited the Democratic Republic of the Congo (DRC) to 'shine a light' on the 'weaponisation of rape'.During her three-day visit, she met female peacebuilders working at the grassroots level to highlight their efforts supporting local peace initiatives and witnessed the devastating impact of the ongoing conflict, particularly on women and girls.In June, the duchess spoke passionately about her campaign to highlight the plight of victims of sexual violence and insisted that the country 'must do better'.At the UK's first exhibition dedicated to the subject, Sophie, who made the visit ahead of the International Day for the Elimination of Sexual Violence in Conflict, declared that the topic was woefully 'under-discussed'.The Duchess spoke movingly about a visit she had made to Kosovo in 2019 and how deeply moved she had been when speaking to women about the 'shame and stigma' they experienced as a result of being brutalised.