Daniel Urban Kiley (2 September 1912 – 21 February 2004) was an American landscape architect, who worked in the style of modern architecture.

[1] Kiley designed over one-thousand landscape projects including Gateway Arch National Park in St.

He worked briefly for the National Park Service in Concord, New Hampshire, and later the United States Housing Authority, where he met architect Louis Kahn.

From 1943 to 1945, Kiley served in the United States Army as Captain in the Presentation Branch of the Office of Strategic Services, becoming its director after architect Eero Saarinen stepped down.

While in Europe, he visited the Château de Villandry and the Palace of Versailles, as well as the work of André Le Nôtre, whose formality and geometric layout shaped his later classical modernist style.

Throughout Kiley's practice, he hired such designers as Cheryl Barton, Miho Mazereeuw, Kevin Roche, Harry Turbott, and Peter Walker.

Before it was completely destroyed the garden was saved by the City of Tampa and partnerships between local businesses and community members who wanted to preserve the legacy Dan Kiley left behind.

The geometric layout of allees, bosques, water, paths, orchards, lawns, and other landscape features characterize Kiley's style.

Kiley called this approach, slippage, or an extension beyond the implied boundary, creating ambiguous relationships in the landscape.