Exploring Blackrock Castle Observatory: from fortification to space exploration

With over 400 years of history, Blackrock Castle is rich and varied. Built in 1582 by citizens, at the request of Queen Elizabeth I, the castle was originally a defensive coastal fortification designed to prevent pirates and invaders from entering the town. Indeed, its strategic location made it ideal for protecting the town, and so the original tower was built. The tower was also used to guide ships through the port.

Since then, the structure has undergone numerous transformations. For instance, in 1604, Lord Deputy Mountjoy replaced the fort with a castle, adding new circular watchtowers. Over the centuries, Blackrock Castle has played many different roles. In the 19th century, it served as a coastguard station, before becoming a private residence in the mid-1800s. During the 20th century, the castle also housed a restaurant and offices.

Thanks to a collaboration between Cork City Council and the Cork Institute of Technology, the building constructed an observatory in the early 2000s inside the castle and took on a new role as a science centre and observatory, in addition to organising tours of the castle.

Today, it stands as the oldest surviving structure still in use in Cork and a national monument, blending history with modern scientific research.

Step inside this historic Cork landmark and learn as much about the space as you do about the castle's history. Below you’ll see some of the activities you can enjoy during your visit:

Castle guided tours

First of all, follow the passionate guides on a guided tour through the castle's centuries to discover its long history and stories. From the original fort to the most recent observation construction and its modern telescopic dome built at the top of the tower, you’ll see it all. In fact, discover exclusive places that are only accessible in the company of a guide. And above all, enjoy a breathtaking view of the Lee River and the village of Blackrock from the top of the castle towers.

Interactive Exhibitions

Explore space, astronomy and marine biology through interactive exhibits in the castle all year round. First of all, the permanent exhibition presents Ireland in space and lets you discover the deep connection between the Irish and the stars over the years. In addition, discover Ireland's contributions to space exploration and learn fascinating details about the universe.

What's more, keep an eye out for new exhibitions and events, as you're likely to see new exhibits arriving on site and some events taking place at the Observatory throughout the month, such as Culture Nights, which allow visitors to celebrate another facet of astronomy.

Star Show

Gaze up at the stars in the observatory, where expert astronomers will guide you through the wonders of the night sky. Using specialised software in the telescope dome, get ready to see the position of celestial wonders, and you'll even be able to differentiate between certain stars and planets. After a 20-minute show, you'll take part in a question-and-answer session. So don’t be shy, it's your time to shine and ask any questions you may have about astronomy.

The Castle Café

For those wishing to relax after a visit, head to the castle’s historic courtyard and try the “Castle Café”. Open from Wednesday to Sunday, this family-run restaurant, bar and kitchen garden is the ideal place for lunch or a coffee break with a view of the castle.

📍 Address: Castle Rd, Blackrock, Cork, Ireland.

🕒Opening times: The observatory at Blackrock Castle is open to the public from Tuesday to Sunday each week, from 10am to 5pm. Please note, however, that the site has announced that it will soon be changing its opening times.

🎟️ Admission : To access the observatory and visit the castle you need to book a ticket in advance or on site. Admission prices are as follows:

• Adults: 9€ (£8)
• Children (up to 16 years old): 6€ (£5)
• Students: 7€ (£6)