As organised occupational groups, guilds have ancient origins, and in Roman times were known as collegia. Although they were an important part of Renaissance society, few if any appear to have commissioned group portraits, which were largely confined to families at that time. This changed in the Dutch Golden Age, and some of its best-known paintings depict occupational and other groups.

In 1617, Michiel van Mierevelt and his son Pieter, specialists in portraiture, painted The Anatomy Lesson of Dr. Willem van der Meer, one of the earliest portraits of a social group from the Dutch Golden Age. Members of this group are all ignoring the cadaver in front of them, preferring to look at the painter, and are thought to be members of the Surgeons’ Guild of the city of Delft, who commissioned this work.

Rembrandt painted his Anatomy Lesson of Dr. Nicolaes Tulp in 1632, as an early commission soon after his arrival in Amsterdam. It’s a group portrait of distinguished members of the Surgeons’ Guild in their working environment. Most remarkable is the fact that its principal, Dr Tulp, and most of his colleagues aren’t looking at the dissected forearm.

As cities developed in the Dutch Republic, guilds and associations flourished. This wasn’t a period of peace, and most towns and cities required adult males to be members of the local civic militia or schutterij for mutual defence. These were operated using the guild model, with local men appointed to military rank for their command. Their roles included helping defend the town or city in the event of attack or revolt, and manning a night watch, in which members took turns to patrol the streets.

One of the earlier of these group portraits is Frans Hals’ Banquet of the Officers of the Calivermen Civic Guard from 1627. Contemporary records have enabled their identification as (from the left) Willem Claesz. Vooght, Johan Damius, Willem Warmont, Johan Schatter, Gilles de Wildt, Nicolaes van Napels, Outgert Akersloot, Matthijs Haeswindius, Adriaen Matham, Lot Schout, Pieter Ramp, and Willem Ruychaver at the right.

The cost of these group portraits was relatively modest, as it was normally shared between those depicted. In most cases shares weren’t equal, but determined by the member’s rank in the organisation.

Hendrik Gerritsz Pot used the novel technique of putting indigo layers over underpainting, without the protection of glazes, in his Portrait of the St Adrian Civic Guard, Haarlem from 1630. As a result of fading of the indigo, what were originally bright blue sashes have become almost white, as shown in the detail below.

Frans Hals’ Officers and Sergeants of the St Adrian Civic Guard (1633) not only shows the same group of men, but has suffered exactly the same fate with their formerly blue sashes.

Hals’ Militia Company of District XI under the Command of Captain Reynier Reael (1633-37) shows a group known as the Meagre Company. He was commissioned to paint this in 1633, but three years later it remained unfinished, and the commission was transferred to Codde to complete the right side of the canvas and many of the hands and faces a year later.

Painted a decade later, Rembrandt’s vast group portrait of The Night Watch (1642) is perhaps the most famous of them all, although it’s more correctly titled Militia Company of District II under the Command of Captain Frans Banninck Cocq. It features the commander and seventeen members of his civic guard company in Amsterdam, and took the artist three years to complete from his first commission to paint this for display in the great hall of the guards.

Captain Frans Banninck Cocq (in black with a red sash), followed by his lieutenant Willem van Ruytenburch (in yellow with a white sash) are leading out this militia company, their colours borne by the ensign Jan Visscher Cornelissen. The small girl to the left of them is carrying a dead chicken as a symbol of arquebusiers, the type of weapon several are carrying (detail below).

Some of these militia group portraits commemorated events of greater significance than social occasions. On 15 May 1648, peace between Philip IV of Spain and the Lords States General of the Dutch Republic was finally ratified to end the Eighty Years’ War, and on 18 June this was marked by The Celebration of the Peace of Münster, 18 June 1648, in the Headquarters of the Crossbowmen’s Civic Guard (St George Guard), Amsterdam, painted here by Bartholomeus van der Helst with Jan Vos.

At the right with a silver horn is Captain Cornelis Jansz. Witsen, who is shaking the hand of Lieutenant Johan Oetgens van Waveren. In the centre, seated behind the drum with a flag draped over him, is Reserve Officer Candidate Jacob Banning, and around him are Sergeants Dirck Claesz. Thoveling and Thomas Hartog.

Neighbourhood and welfare organisations also flourished, and the latter distributed money, food, clothes and fuel to the poor. These were run by the middle classes, who formed themselves into regents for the purpose of their administration.

Johannes Cornelisz Verspronck’s Regentesses of the St. Elisabeth’s Hospital (1641) shows the group of august ladies who oversaw that charitable foundation in Haarlem. Time has shown that they too were victims of fugitive pigment, as their tablecloth was originally a rich green. Its unprotected indigo blue has faded from much of its surface, leaving most of it an odd yellow ochre hue.

The gentlemen shown in Frans Hals’ group portrait of the Regents of the Old Men’s Alms House, Haarlem from 1664 were responsible for running the alms house for poor elderly men in the city of Haarlem.

In the distant past, fresco painting was ideal for brightening up the walls or ceiling of a substantial building, but there was also demand for smaller, more portable works of art. Some would have been painted onto animal skins, and were ultimately developed into miniatures in beautiful manuscripts, using the precursors of watercolours. One alternative medium developed most successfully was wax, in encaustic painting.

Characteristically this uses binder that in most ambient temperatures is solid, but becomes liquid paint at higher temperatures, usually no higher than the boiling point of water. This enables the painter to heat mixtures of pigment and binder kept at around 50˚-90˚C (120˚-200˚F), apply them while still hot, and for them to bind the pigment to its ground once the paint cools.

People started to keep bees by around 7000 BCE, and one of their most important products has been the wax from which they build their hives. Beeswax has a typical melting point of about 63˚C (145˚F), a temperature readily achieved by heating water but well above daytime maximum air temperatures experienced where people live, which very seldom reach 50˚C (120˚F). Beeswax was therefore most probably the first binder used for encaustic painting.

Encaustic paint is thus unusual as it doesn’t rely on a chemical process to form the dry paint layer, but a physical change of state, which is fully reversible. Common supports include panels of wood, which originally didn’t have any ground applied. More recently grounds of gesso have been used successfully, but encaustic paints have also been applied to a wide range of supports including dried and fired clay tablets, pots, and sculpture.

One significant limitation with the process of painting using encaustic media is that heated paint tends to be thin and runny. Most artists therefore apply their paint with the support laid flat, and leave their work horizontal until the paint has solidified. Instead of painting stood up in front of an easel, they tend to work lying down.

Although encaustic paintings are susceptible to physical damage and decay, some from before the Christian era have survived, and it’s thought that the medium was used for several hundred or even thousands of years before the birth of Christ. The best-known early encaustic paintings are those made by colonists from Greece and Rome when living in Egypt between about 80-250 CE, particularly those found in the Fayum (or Faiyum) Basin. These were first discovered in about 1615, with most being removed during the nineteenth century and spread across collections in Europe and America. These funerary portraits are among the most haunting images in European art, and demonstrate how skilled encaustic painting can rival other media. It can achieve a remarkable lucency, although this depends on the processing of the beeswax and its ageing.

This Funerary Portrait of a Woman ‘Isidora’ is rendered in fine, close-packed strokes of encaustic wax to model the form, and the eyelashes have been formed by scraping away wax to reveal the underlying black ground. Originally painted on a rectangular cedar board, small squares of gold leaf were applied around her neck, and the board cut down to size to fit the facial area of the woman’s mummy for interment.

Modelling of the skin in this Funerary Portrait of the Boy Eutyches is well in advance of its time, and appears more characteristic of portraits from the Renaissance over a thousand years later.

A tradition of encaustic painting also grew up in early Christian communities, where it was used to create icons for places of worship and the homes of the wealthiest.

This encaustic painting of the Virgin Mary and Child with Saints Theodor of Amasea and George, and Angels was made in about 580 CE for Saint Catherine’s Monastery in Sinai, not far from where the Fayum portraits had been interred.

A few artists continued to paint in encaustic even after the Renaissance, although this has remained a minority pursuit. Giovanni Francesco Romanelli’s painting of Boys Fishing from about 1640 curiously uses cardboard as its support, suggesting it may have been more of an experiment.

The nineteenth century saw a resurgence in the use of more traditional media such as egg tempera. In addition to painting with that, some like Arnold Böcklin returned to try encaustics, here in one of his major works, the first version of Villa by the Sea from 1864.

More followed suit in the twentieth century, including James Ensor, Diego Rivera and Jasper Johns, and today encaustic methods have a small but enthusiastic following.