The History of the NTMA

The National Terrazzo and Mosaic Association has a rich history. Scroll the timeline below to see how NTMA has evolved over the years.



Friuli region in Italy-the beginning of the “modern” terrazzo era. Terrazzo was created when resourceful Venetian mosaic workers discovered a way to reuse marble remnants; with off-size chips, they began to build terraces around their living quarters.

Techniques for leveling these surfaces progressed from rubbing with a stone by hand, to the development of a long-handled, weighted grinding stone, called a galera.

The first sealer for terrazzo was discovered when workers noticed that a coating of goat milk brought out the rich colors and sheen of the marble.



The first Italian mosaic workers came to the United States around 1875


By 1890, all the mosaic workers in the US were Italians who picked up their trade in Venice. They came from: Sequals, Toppo, Tauriano (e.g. Trevisan, Bertin, Patrizio, Martina, Cristofoli, De Paoli, Pasquali, Pellarin, Carnera); Fanna, Cavasso Nuovo, Arba, Frisanco (e.g. Filippi, Roman, D’Agnolo, De Marco, Lovisa, Maraldo, Serena, Di Pol, De Spirt, Marus, Andreuzzi, Mion, Franceschina).



Most of these mosaic and terrazzo workers started businesses of their own:

First in New York, Philadelphia, Boston;

Later in the Midwestern states, in Washington D.C. and San Francisco;

Finally in the states of the South and West.

They became paradigms of self-made businessmen and built a powerful network of firms


1920’s Yearbook Covers


In the early 1920s terrazzo overtook mosaic in popularity and became a popular flooring material for public buildings and apartment buildings.

Huge request for terrazzo workers, instead of mosaic workers.

The introduction of the electric grinding machine around 1919 influenced the spread of terrazzo all over the US.

Metropolitan Museum of Art Mosaic Floor executed by Giovanni Battista Pasquali, G. Pellarin and A. Carnera in 1905

Terrazzo Surfacing Machine Advertisement, 1926

Terrazzo Workers at the Smithsonian Museum, 1910 ca.

A great number of Italian terrazzo workers, who had worked in Germany before World War I, reached the US in the 1920s.

Many came from the “old” villages (Sequals, Fanna, Arba, Cavasso Nuovo), but also from other towns in Friuli (Santarossa from Rorai Piccolo, Corradini from Barcis, Magnan from Meduno), and from the rest of Italy (Grazzini and Arrigoni from Tuscany, Zanchettin from Treviso).


National Terrazzo and Mosaic Contractors Association formed in Chicago, Illinois by Gus Cassini of Rock Island, Illinois. The name changes to The National Terrazzo and Mosaic Association in 1929, when the group first allows supplier members.

29 terrazzo / mosaic companies


The first annual NTMA convention is held February 23-25 at the La Salle hotel in Chicago with 25 contractor members.

1924 Convention


In 1926, 40 of the 60 NTMA firms were owned by Italians; in 1938 of the 93 companies approximately 60 belonged to Italians or Italian-Americans. In same cases they also had family ties. “Our Association is an 80 percent Italian organization” (NTMA President Antonio Tramontin, 1930 Washington Convention)

60 terrazzo / mosaic companies


Cavicchi Grinders 1928


105 terrazzo / mosaic companies


1930’s Yearbook Covers

1920’s and 1930’s

Between the 1920’s and 1930’s, Americans recognized the contribution of terrazzo and mosaic companies to US architecture and the building sector.

Terrazzo and mosaic companies were expanding an artisanal craft whose roots dated back to 16th century Venice.

“I have recognized the fact the art in which you are interested has a wonderful history, that it includes the efforts of well known leading artists, particularly the mosaic end of it, and I realize that in some of our most beautiful office buildings you have added the charm of terrazzo work…So that your art, in going back to the days of the ancients and carried forward throughout the modern times, is one which you can very well indeed feel proud of” (Detroit Councilman, 1929)


Marriage of Linda Pellarin, daughter of John Pellarin from the Pellarin & Co. of St. Louis, and August Cozzi, son of Pete Cozzi from the Tulsa Terrazzo Mosaic Co. of Tulsa, 1931

1931 NTMA Convention in Atlanta


“Although a member of the Terrazzo Association, I must admit that I am not a terrazzo man. At that, I don’t see how I can be blamed if my ancestors do not hail from Cavasso Nuovo, Fanna or Sequals in Northern Italy.”

(Architect A. Reed Wilson, The Art of Mosaics and Terrazzo, 1931)

“The Art of Mosaics & Terrazzo” Magazine, June 1932


Texas State Capitol 1938


1940’s Yearbook Covers


During World War II, NTMA membership dropped. Nevertheless, terrazzo was still widely used in war factories, and on Army and Navy bases In the early 1940s, 6,500,000 sq. ft. of terrazzo was installed in the Pentagon by Roman Mosaic & Tile Co. from Philadelphia, and by Columbia Mosaic & Tile Co. from Maryland

  • Strong growth of the terrazzo industry after the end of W. W. II
  • Labor shortage problem for both mechanics and helpers
  • NTMA officials suggested that terrazzo companies import labor force from Italy, looking for “the people who have terrazzo in their blood”

Terrazzo Workers at The Pentagon, 1942

Medusa White 1940


Huge increase in NTMA membership after the end of the war.

116 terrazzo / mosaic companies


Universal Atlas


200 terrazzo / mosaic companies

In 1947, however, there were 150 other terrazzo and mosaic companies operating throughout the US who did not belong to the NTMA


Advance Grinders


1950’s Yearbook Covers


Advance Grinders



CIBA Epoxy, Willingham


1960’s Yearbook Covers


According to 1962 NTMA membership list:

  • Terrazzo companies spread across the country, finally setting up shop in Southern states (36 firms in Florida, 22 in California, 19 in Texas);
  • For many firms that were established in the 1920s and 1930s, the second generation began to take control;
  • Most of the NTMA terrazzo companies also did tile work.


The National Terrazzo & Mosaic Association, Inc.


American Terrazzo Strip


Universal Atlas Map


1966 NTMA Convention in New Orleans


Terrazzo Promotion Advertisement, Atlas White

Atlas White 1968


Monile Roman, Terrazzo


1970’s Yearbook Covers


1971 NTMA Convention in Indianapolis






Universal Atlas

Universal Atlas May 1976


Atlas Lion


1980’s Yearbook Covers


Cactus Canyon


1990’s Yearbook Covers


2000’s Yearbook Covers

NTMA 2005
NTMA 2006
NTMA 2007
NTMA 2008
NTMA 2009


2010’s Yearbook Covers

NTMA 2010
NTMA 2011
NTMA 2012
NTMA 2013
NTMA 2014
NTMA 2015
NTMA 2016
NTMA 2017
NTMA 2018
NTMA 2019


2020’s Yearbook Covers

NTMA 2021
NTMA 2022


The NTMA celebrates its 100 Year Anniversary.

How Stuff Works: Terrazzo