When visitors look up at Windsor Castle today, they are looking at a building with a remarkable connection to British royal history. According to the Royal Collection Trust, Windsor Castle was founded by William the Conqueror in the 11th century and has subsequently been home to 40 monarchs.

That makes Windsor Castle much more than a spectacular historic building. It is a place where more than nine centuries of changing royal history can be seen in its architecture, rooms, chapel, gardens and traditions.

“Windsor Castle is the oldest and largest occupied castle in the world.”
— Royal Collection Trust

👑 From William the Conqueror to the Modern Royal Family

The story begins in the aftermath of the Norman Conquest. William the Conqueror established Windsor as a strategically important royal fortress during the 11th century. Over the centuries, successive monarchs altered, enlarged and redeveloped the Castle.

The result is the extraordinary mixture of medieval fortifications, grand royal apartments, St George’s Chapel, ceremonial spaces and working areas that visitors can explore today.

The Royal Collection Trust describes Windsor Castle as being home to 1,000 years of royal history, with the Castle having been occupied by 40 monarchs. ([Royal Collection Trust](https://www.rct.uk/visit/windsor-castle?utm_source=chatgpt.com))

📜 A Castle That Changed With Its Monarchs

One of the most fascinating things about Windsor Castle is that it is not simply a monument frozen in the past. Different monarchs have left their mark on the Castle.

The Royal Collection Trust highlights the contributions of monarchs including Edward III, Charles II and George IV, whose building programmes helped shape the Castle visitors recognise today.

The Castle’s history also includes moments of considerable change. The devastating fire of 1992 damaged many rooms, followed by a major five-year restoration programme. The restored Castle is now part of the continuing story of Windsor.

🔥 Did You Know About the 1992 Fire?

The 1992 fire destroyed many rooms within Windsor Castle. The subsequent restoration took five years and became one of the most significant conservation projects in the Castle’s modern history. ([Royal Collection Trust](https://www.rct.uk/visit/windsor-castle?utm_source=chatgpt.com))

This is one reason Windsor Castle is particularly interesting to repeat visitors: different areas tell different chapters of its long history.

🎖️ Windsor Castle Today

Windsor Castle remains an active royal residence as well as a major visitor attraction. The Royal Collection Trust currently describes it as the world’s oldest and largest occupied castle. ([Royal Collection Trust](https://www.rct.uk/visit/windsor-castle?utm_source=chatgpt.com))

The Castle also continues to host ceremonial traditions. The Household Division’s September 2026 schedule lists Windsor Castle Guard changes and related ceremonial events during the month. ([Household Division](https://www.householddivision.org.uk/changing-the-guard-calendar?utm_source=chatgpt.com))

📚 Sources & Further Reading

Royal Collection Trust — Windsor Castle:
https://www.rct.uk/visit/windsor-castle

Visit Windsor — Windsor Castle information:
https://www.windsor.gov.uk/

Household Division — Changing the Guard calendar:
https://www.householddivision.org.uk/changing-the-guard-calendar

Photograph: Unsplash — “Windsor Castle in 2019”, Windsor, UK. View the photograph on Unsplash