Separating Kungsholmen from Norrmalm, Klara sjö isn’t just a canal; it’s a story etched in water. Klara sjö, Swedish for “Lake Klara”, connects Barnhusviken to Riddarfjärden. Together with other bodies of water, it carves out Kungsholmen from the mainland.
Klara sjö is more than just a waterway. It’s a testament to Stockholm’s ever-changing landscape. Once a broad lake, continuous land fillings during the 18th century transformed it into the narrow canal we see today. The name “lake” is a relic of its past.
Four bridges span Klara sjö. Stadshusbron, Klarabergsviadukten, Kungsbron, and Blekholmsbron mark the cityscape. Stadshusbron dictates the maximum height for boats passing through the canal at 3.3 meters.
Notice the prominent buildings lining Klara sjö. The iconic Stockholm City Hall stands proudly on the southern shore. The Seraphim Hospital, operational from 1752 to 1990, graces the western side.
The Klara district lends its name to Klara sjö. The district itself is named after a former monastery dedicated to Saint Clare. Even today, local streets and structures bear names reminiscent of Blekholmen. This small island once stood here and is now part of the eastern shore.
Until the mid-1800s, Klara sjö was much wider. The construction of the Klaragasverket gas plant, railway tracks, Stockholm Central Station, and Vasagatan led to significant land reclamation. Old maps vividly illustrate this transformation. A map from 1702 depicts Klara sjö as a large bay of Lake Mälaren. It stretched all the way up to present-day Klarabergsgatan and Vattugatan. Back then, a 500-meter floating bridge, Kungsholmsbron, crossed the bay. Today’s Stadshusbron is only 85 meters long.
Unfortunately, the past has left its mark. Former gasworks operations at Klaragasverket have heavily contaminated the bottom of Klara sjö. Metals and organic substances, primarily tar residues, linger from the gas plant. The plant was located on the northern side of Klara sjö between Kungsbron and Klarastrandsleden.
At Klara sjö’s southwestern shore lies Stockholm City Hall and Yngve Larsson’s park. The old Serafimerlasarettet hospital overlooks the area. To the north, Klara sjö meets Kungsbron. It then continues as Barnhusviken.
Klara sjö’s water turnover is slow. Narrow connections to both Ulvsundasjön and Riddarfjärden contribute to this. Despite these challenges, Klara sjö remains a vital part of Stockholm’s identity. It’s a reminder of the city’s history and resilience.
So, as you stand here by Klara sjö, remember it’s more than just water. It’s a living story, shaped by time and human endeavor. A story of transformation, adaptation, and enduring beauty.