“I always look ahead, never back,” Finnish design legend Eero Aarnio has been quoted as saying. A leading innovator of modern furniture design, Aarnio has long embraced a bold, playful, confident and colorful style several steps ahead of his time.

For his 1954 entrance test for the Institute of Industrial Arts in Helsinki, Aarnio created a whimsical painting of a man reading a newspaper in a red, curved chair whose silhouette foreshadowed Aarnio’s Ball chair of 1963. That spherical seat skyrocketed him to design fame, and decades later, it is still recognized as one of the world’s most futuristic designs.

Born in 1932 to a house painter and a seamstress, Aarnio has always had a cheerful disposition and an independent spirit. He went his own way early on: After just two years at Asko, the big Scandinavian furniture company that originally produced his Ball chair, Aarnio established his own studio in 1962.

Over the next decade, the young visionary made an indelible mark on the world. Open-minded and entrepreneurial, Aarnio embraced the aesthetics, materials and technologies of the Swinging Sixties, working with a new generation of plastics and molding them into fluid, organically shaped, brightly hued forms.

Introduced at the 1966 Cologne Furniture Fair, the pod-like fiberglass Ball chair soon adorned the homes of movie stars and royalty, graced magazine covers around the world and was featured in films and ads. The groundbreaking seat originally came in orange, white, black, yellow and red and could be ordered with a telephone installed in it. Yet this designer of the future, as he was known in the 1960s, has always insisted that he didn’t deliberately seek to be associated with the decade’s sci-fi aesthetic.

“I had no intention to create either pop or Space Age design — as many people label my work,” Aarnio declares in one of the essays included in Eero Aarnio — Designer of Colour and Joy, a book jointly created by the Design Museum and publisher WSOY to accompany 2016’s “Eero Aarnio” exhibition.

The show featured a number of Aarnio’s objects, including his iconic Ball, Pastil (1967), Bubble (1968), Tomato (1971) and Pony (1973) chairs. These were joined by lesser-known seating and other objects like the rattan Juttujakkara, or mushroom, stool (1960); the sculptural Double Bubble lamp (2000), with which Aarnio first explored the possibilities of rotation-cast plastic; and the three-legged Rocket (1995) and Baby Rocket (2006) stools, both parts of a collection produced by Artek after Tom Dixon, the company’s creative director from 2004 to 2009, discovered the original piece in Aarnio’s kitchen.

“Aarnio expanded the whole idea of what constitutes furniture,” explained Suvi Saloniemi, the Design Museum’s chief curator. “His significance as a designer is crystallized in the liberation of form that he has introduced by discovering the properties of plastic as the material of a designer. His furniture is sculpture-like and eye-catching, but the pieces are always utilitarian at the same time.”

Find an extraordinary range of vintage Eero Aarnio chairs, tables and other furniture on 1stDibs.

A Close Look at modern Furniture

The late 19th and early 20th centuries saw sweeping social change and major scientific advances — both of which contributed to a new aesthetic: modernism. Rejecting the rigidity of Victorian artistic conventions, modernists sought a new means of expression. References to the natural world and ornate classical embellishments gave way to the sleek simplicity of the Machine Age. Architect Philip Johnson characterized the hallmarks of modernism as “machine-like simplicity, smoothness or surface [and] avoidance of ornament.”

Early practitioners of modernist design include the De Stijl (“The Style”) group, founded in the Netherlands in 1917, and the Bauhaus School, founded two years later in Germany.

Followers of both groups produced sleek, spare designs — many of which became icons of daily life in the 20th century. The modernists rejected both natural and historical references and relied primarily on industrial materials such as metal, glass, plywood, and, later, plastics. While Bauhaus principals Marcel Breuer and Ludwig Mies van der Rohe created furniture from mass-produced, chrome-plated steel, American visionaries like Charles and Ray Eames worked in materials as novel as molded plywood and fiberglass. Today, Breuer’s Wassily chair, Mies van der Rohe’s Barcelona chair — crafted with his romantic partner, designer Lilly Reich — and the Eames lounge chair are emblems of progressive design and vintage originals are prized cornerstones of collections.

It’s difficult to overstate the influence that modernism continues to wield over designers and architects — and equally difficult to overstate how revolutionary it was when it first appeared a century ago. But because modernist furniture designs are so simple, they can blend in seamlessly with just about any type of décor. Don’t overlook them.

Finding the Right footstools for You

Antique and vintage footstools might add a dose of fun to your living room, but they’re also hard workers.

Even as they’ve morphed into objects with plenty of functions over time, the footstool has a royal past. In Ancient Egypt, a footstool was used to climb onto an elevated chair or placed under someone’s feet as he or she was seated in a temple or private residence. Footstools were also in use during the Ottoman Empire. In fact, the ottoman, an upholstered seat or small bench that initially had no back or arms, was the main seating furniture in a home. Ottomans were a way to merge floor seating with cushions and mats.

Poufs, which originated in France, are also thought of as convenient seating furniture as well as occasionally serving as a side table, if needed. (Although, a pouf is typically not as firm as an ottoman.)

Over the years, footstools have taken on varying purposes. They have been used as small portable chairs, for example.

During the 18th century, a footstool might have been long with a low profile, which rendered it perfect for fireside seating. Victorian footstools were small but not unassuming, as furniture makers of the era would upholster the pieces so that they paired with the nearby sofa or wingback chairs. Footstools have even become a storage solution at home, with designers outfitting them with compartments. Today, a footstool might be used to organize quilts and blankets or other textiles, especially if you’re trying to keep things uncluttered in a small apartment.

Footstools are now available in all sorts of provocative colors, upholstery and more. No one is going to put a velvet footstool out on the curb, right? When shopping for your own footstool, try to find one that meets the height of your sofa or other seating (or is a tad lower). It should also be sturdy but not a heavy, clunky piece that’s a chore to move around.

The footstool is both decorative and functional. Not unlike a good throw pillow, interior designers have found numerous uses for this versatile, vibrant furnishing. Find yours in the growing collection of antique and vintage footstools today on 1stDibs.