Pour yourself a cup of java and scroll to learn about one of the world's most popular beverages.

It all starts with a seed. Coffee plants take many years to fully mature and are a challenge to cultivate, but the fruits of that labor are these cherries.

When the cherries have ripened, they're harvested by workers in coffee-producing countries around the world. Most coffee grown is of the arabica variety, with robusta coffee making up the remaining 40%. 

This 1935 painting by Brazilian painter Candido Portinari shows just some of the work that goes into each cup of the aromatic elixir.

The coffee cherries are dried, sometimes in a machine like this, and the fruit is removed. The seeds inside are known as green coffee beans.

The beans are then roasted, resulting in the rich, brown coffee we know and love.

The cup isn't done just yet. The beans must be ground first, sometimes by industrial machines and sometimes by hand at home.

Now, with the fragrance already in the air, we can begin the brewing process--done most simply by pouring hot water over the coffee grounds.

Moments later, we can enjoy a piping-hot, aromatic beverage. Coffee is served and prepared in almost innumerable ways.

This opulent building is the Coffee House at Quirinale Palace in Rome. Imagine having a house just for coffee!

The painting was made by Osman Hamdi Bey at a time of great social and political turmoil in the Ottoman Empire, the absurd task and outdated fashions reflected the popular belief that the empire was losing its way in the world.

The Tortoise Trainer is held at the Pera Museum in Istanbul, Turkey, which specialises in 19th century paintings by European and Ottoman-Turkish artists.

The museum also holds the Anatolian Weights and Measures Collection, comprising hundreds of artefacts representing the artistic, scientific, and commercial innovations of the region.

Now we're on the right floor, where is The Tortoise Trainer? It can't have gone far… Click and drag to explore the galleries, and keep an eye out for the painting!

Here it is! Osman Hamdi Bey's The Tortoise Trainer

The painting depicts an old man, dressed in the style of a dervish, carrying a ney flute and nakkare drum. He watches his tortoises with calm contemplation, and with the drum slung on his back he even resembles them.

This unusual painting wasn't widely understood or exhibited at the time, but came to be seen as a potent satire after the Young Turk Revolution of 1908, which saw the end of the old Sultan's rule.