This peaceful swath of greenery affords lovely views of St. Vitus's Cathedral and the Castle's walls and bastions. Originally laid out in the 16th century, it endured devastation in war, neglect in times of peace, and many redesigns, reaching its present parklike form early in the 20th century. Luckily, its Renaissance treasures survived. One of these is the long, narrow Míčovna (Ball Game Hall), built by Bonifaz Wohlmut in 1568, its garden front completely covered by a dense tangle of allegorical sgraffiti.
The Královský letohrádek (Royal Summer Palace, also known as the Belvedere), at the garden's eastern end, deserves its unusual reputation as one of the most beautiful Renaissance structures north of the Alps. Italian architects began it; Wohlmut finished it off in the 1560s with a copper roof like an upturned boat's keel riding above the graceful arcades of the ground floor. During the 18th and 19th centuries military engineers tested artillery in the interior,
which had already lost its rich furnishings to Swedish soldiers during their siege of the city in 1648. The Renaissance-style giardinetto (little garden) adjoining the summer palace centers on another masterwork, the Italian-designed, Czech-produced Singing Fountain, which resonates from the sound of falling water.