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Foundation Day in San Marino

Join the festivities and embrace the rich history of San Marino on Foundation Day - a celebration you don't want to miss!

Thursday

September 2026

Last updated February 7, 2026 · by the Holiday Calendar Team

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YEARLY DATESeptember 3

OBSERVED INSan Marino

CATEGORYCulture

SUBCATEGORYCivics

INTRO

Introduction

PHOTO

Get ready to celebrate the foundation of the world's oldest constitutional republic on September 3, also known as Foundation Day in San Marino! This small country, located within Italy, has a rich history dating back to the early 4th century. According to legend, Saint Marinus founded the city upon Mount Titano to escape religious persecution and establish a community based on freedom and democracy. Today, San Marino is known for its picturesque landscapes and charming medieval towns. So let's raise our glasses to this beautiful country and all that it represents on this special day!

TIMELINE

Foundation Day in San Marino Timeline

San Marino Formation

Saint Marinus and a group of Christians laid the foundation of San Marino to escape religious persecution, marking this year as the start of the nation.

Territory Expansion

The geographical boundaries of San Marino expanded with the acquisition of Monte Cerreto.

The San Marino Constitution

The Leges Statutae Republicae Sancti Marini was promulgated, establishing San Marino as a parliamentary republic.

Friendship Treaty with Italy

San Marino signed a Friendship and Good Neighborly Relations Treaty with Italy, securing its independence and fostering cooperation between both nations.

First Stamps Issued

The first postage stamps of San Marino were issued, attracting worldwide attention and becoming a significant source of income.

UNESCO Heritage Site

San Marino Historic Centre and Mount Titano were designated as UNESCO World Heritage Sites, recognizing their cultural significance and preserving them for future generations.

GET INVOLVED

How to Celebrate Foundation Day in San Marino

Attend the parade

Start off Foundation Day by joining in on the festive parade through the streets of San Marino. Enjoy the colorful floats, music, and lively atmosphere as you celebrate the country's history.

VISIT

Visit historical landmarks

Take a tour of San Marino's famous historical landmarks, such as the Three Towers of San Marino or the Palazzo Pubblico. Learn about the country's rich history and how it has shaped its foundation.

JOIN

Join a cultural festival

Experience the vibrant culture of San Marino by attending a traditional festival. From food to music to dance, immerse yourself in the local traditions and celebrate with the community.

PARTICIPATE

Participate in a charity event

Give back to the community by participating in a charity event on Foundation Day. Whether it's a fundraiser or a volunteer opportunity, you can make a positive impact while celebrating this special day.

HOST

Host a traditional feast

Gather friends and family for a traditional feast featuring local dishes and drinks. Share stories and memories of San Marino's foundation while enjoying a delicious meal together.

WHY THIS DAY MATTERS

Why We Love Foundation Day in San Marino

It showcases San Marino's beauty and attractions

During Foundation Day celebrations, many historical sites and landmarks are open to the public, providing a chance for people to admire the stunning architecture and natural landscapes of San Marino. It's also a great opportunity for tourists to learn more about this charming destination.

It celebrates the history and culture of San Marino

Foundation Day in San Marino is a day to honor and remember the country's founding and the traditions that have shaped it. It's a time to appreciate the rich cultural heritage of the small city-state and its significance in European history.

It brings people together

On Foundation Day, people from all over San Marino come together to celebrate their shared identity and pride for their country. Festivities include parades, concerts, and other community events that allow locals and visitors to bond over their love for this unique nation.