Her Royal Highness Princess Sirivannavari Nariratana Rajakanya visited the Ministry of Foreign Affairs on 4 March 2026, and delivered a special lecture to the Minister of Foreign Affairs, ministry executives, ambassadors, consuls-general, and military attachés, along with their spouses. In total, around 150 persons attended the special lecture, including Prime Minister Anutin Charnvirakul.

The lecture featured two main topics: protocol for receiving royal visits and Thai national dress (Chud Thai Phra Ratchaniyom). Her Royal Highness provided guidance on various matters of conduct, as well as sharing accounts of her personal royal duties undertaken for the benefit of the nation, including her activities in music, sports, and arts.

On this occasion, Her Royal Highness graced the exhibition titled "Princess Sirivannavari Nariratana Rajakanya and Her Royal Duties in Foreign Affairs," organized by the Ministry to honor and pay tribute to Her Royal Highness’s contributions across various dimensions of international engagement.

The contributions are, for example, royal duties in fostering diplomatic relations with foreign countries and royal duties in promoting Thailand's image through music, sports, Thai silk, and handicrafts, especially the promotion of Chud Thai Phra Ratchaniyom and the proposal to inscribe " “Chud Thai: The Knowledge, Craftsmanship and Practices of the Thai National Costume” on the UNESCO Intangible Cultural Heritage list.

Her Royal Highness also viewed a Thai fabric showcase by the Foundation for the Promotion of Supplementary Occupations and Related Techniques (SUPPORT Foundation), established by Her Majesty Queen Sirikit, and outstanding OTOP products from various provinces, and visited the European Affairs Department, as well as the Situation Monitoring Center for assessing tensions in the Middle East (War Room).