First Republic
Plečnik Remade Parts of Prague Castle for the Czechoslovak Presidency
Prague City Tourism says Josip Plečnik carried out extensive Castle modifications from 1920 to 1935 as it served the Czechoslovak president.
Prague Castle

The republican change is visible not through demolition of the old Castle, but through modern interventions inside it.
Look for republic inside monarchy
Prague Castle carries medieval and Habsburg associations so strongly that the First Republic can disappear inside the older layers. Prague City Tourism gives a clear twentieth-century anchor: Josip Plečnik modified the Castle from 1920 to 1935 as the seat of the Czechoslovak president. The transformation did not require erasing the historic complex. It required fitting new state functions into old royal architecture.
Read intervention rather than replacement
Plečnik worked across courtyards, southern gardens and interiors, including presidential spaces associated with Masaryk. That distribution matters. A political regime change can become visible through paths, paving, thresholds, rooms and garden design rather than one new monumental building. When walking the Castle, ask which elements feel like careful modern insertions within older fabric. The republican layer can be subtle precisely because it was designed to coexist with what came before.
Use Masaryk’s office as the human anchor
Large institutional histories become easier to grasp when tied to a room. The city source names Masaryk’s office among Plečnik’s presidential interventions. Even if you do not enter that specific interior, the reference helps reframe the Castle. This was not only a monument inherited by the republic; it became a working presidential seat. Architecture had to translate a new political system into an old symbolic centre.
Reviewed visuals
See the story
Supporting images selected in the Prague Stories visual review. Context images are labeled so they are not mistaken for documentary proof of the exact subject.

Castle complex layers and St George’s Basilica are visibly seen from above.
Quick facts
- Prague City Tourism dates Plečnik’s Castle modifications to the interwar presidential period.
- The modifications were made for the seat of the Czechoslovak president.
- The work affected courtyards, gardens and interiors.
- The source specifically names Masaryk’s office among the presidential interiors.
Questions
Who led the First Republic-era Castle modifications?
Prague City Tourism identifies Josip Plečnik.
Which presidential interior does the source name?
Prague City Tourism specifically names Masaryk’s office among Plečnik’s presidential interiors.
Sources & further reading
- Prague Castle — Prague City Tourism