Dot Tracks and Cracks

Design by Antoni Gaudi. Parc Guell, Barcelona, Spain, 2007.

For other examples of Gaudi's work, see "Gaudi Circles," "Casa Mila," and "Spires and Cranes."

Photo by I. Peterson

Elliptic Suffusion

Suffusion by Arthur Carter. George Washington University, Washington, D.C., 2016.

Photo by I. Peterson

Atomic Cube

University of North Florida, Jacksonville, Florida, 2012.

Photo by I. Peterson

Sampler Symmetries

Antique European needlework sampler of symmetric patterns demonstrating various types of stitches.

Photos by I. Peterson

Capitol Snow

U.S. Capitol, Washington, D.C., 1982.

Photo by I. Peterson

Kenneth Snelson (1927-2016)

Sculptor Kenneth Snelson in his Manhattan studio, New York City, 2011. Snelson died on December 22, 2016.

Needle Tower by Kenneth Snelson. Hirshhorn Museum and Sculpture Garden, Washington, D.C., 1985.

Snelson's Needle Tower delivers a wonderful geometrical surprise when you venture underneath and look up to see a striking symmetrical pattern.

Virlaine Tower by Kenneth Snelson. Besthoff Sculpture Garden, New Orleans, Louisiana, 2010.

Sagg Main Street by Kenneth Snelson. Philadelphia, Pennsylvania, 2000.

Forest Devil by Kenneth Snelson. Mellon Park, Pittsburgh, Pennsylvania, 2010.

See also "Snelson's Atom."

Photos by I. Peterson

Cathedral at Christmas

The Cathedral Basilica of St. Francis of Assisi. Santa Fe, New Mexico, 2015.

Photo by I. Peterson

Farolito Walk

Candles nestled in paper bags line the street during the Farolito Walk on Canyon Road, Christmas Eve. Santa Fe, New Mexico, 2015.

Photos by I. Peterson

Linear Tree Lights

Toronto, 2006.

Photo by I. Peterson

Golden Loop

Rotunda ceiling mosaic. Royal Ontario Museum, Toronto, Ontario, 2013.

Photo by I. Peterson

Hyperbolic Crocheting

Hyperbolic crocheting by Daina Taimina. Coxeter Symposium, Princeton University, Princeton, New Jersey, 2006.

Photo by I. Peterson

Organ Pipe Symmetry

Seemingly symmetric arrays of organ pipes. Leith Symington Griswold Hall, Peabody Institute, Johns Hopkins University, Baltimore, Maryland, 2016.

See also "Organ Pipes," "Where's the Math?", and "Organ Pipe Distributions."

Photo by I. Peterson

Snow Day Symmetry

Trinity College School, Port Hope, Ontario, 1979.

Photo by I. Peterson

Angels of Montreal

Montreal, Quebec, 2006.

Photo by I. Peterson

Old and New

Contrasting architectural styles. Pittsburgh, Pennsylvania, 2010.

Photo by I. Peterson

Love in Red and Blue

LOVE by Robert Indiana. Philadelphia, 2000.

Photo by I. Peterson

Tower Lines

Photo by I. Peterson

Window Symmetry

Symmetrical arrangement of stained glass windows. Ottawa, Ontario, 1975.

Photo by I. Peterson

Wind Chime Pipes

Wind Chime Memorial, St. Olaf College. Northfield, Minnesota, 2010.

Photos by I. Peterson

Snow Tracks

New Hampshire, 1985.

Photo by I. Peterson

Fall Drips

Photo by I. Peterson

Valley Forge Cabins

Valley Forge National Historical Park, Pennsylvania, 1979.

Photo by I. Peterson

Caterpillar Crowding

A roughly ordered congregation of forest tent caterpillars.

Photo by I. Peterson

Geodesic Mesh

View from inside the Biosphere geodesic dome. Montreal, Quebec, 2009.

Photo by I. Peterson

Iced House

Meadville, Pennsylvania, 2010.

Photo by I. Peterson

Ice Breaks

Wintry harbor scene. Kingston, Ontario, 1975.

Photo by I. Peterson

Worm Tracks

The Three Observed by William Vazan. Agnes Etherington Art Centre, Queen's University, Kingston, Ontario, 2006.

Photo by I. Peterson

Como Lights

Christmas lights straddle a narrow passageway. Como, Italy, 2010.

Photo by I. Peterson

Star Points

Wall design with sixfold symmetry. Temple on Gadi Sagar Lake, Jaisalmer, India, 2010.

Photo by I. Peterson

Christmas Tree and Monument

The fractal-like structure of the National Christmas Tree contrasts with the Euclidean straight lines of the Washington Monument on a snowy day. Washington, D.C., 1987.

Photo by I. Peterson

Gimli House

Gimli House (left). Reykjavik, Iceland, 1985.

Photo by I. Peterson

Sixes and Seven

Doorway, Academic Quadrangle. Rice University, Houston, Texas, 2008.

Photo by I. Peterson