The currency circulated in the Mediterranean trade of this era was gold and silver, and the Persians mainly used gold coins, while the Greek city-states did not have so many gold mines, so they mainly used silver coins. Since each city-state had the power to mint its own silver coins, the currency market throughout the Mediterranean was quite chaotic, and the weight and purity of the coins issued by the different city-states were not uniform, which made trade difficult, so exchange came into being.

At the mention of exchange, Trito Demos vomited in his heart: in the Greek city-states, the business of exchange was mainly undertaken by banks, and the more prosperous the trade city-state, the more developed the banking industry, but in the various cities of Dionia, although there were many banks, they all belonged to one person - Christoya, the wife of the Dionian consul Davers. Of course, this was not the result of any administrative intervention by Davers, but rather the average loan yield of the Christoya Bank, which from the very beginning of its establishment, had adopted an interest rate far below the fifteen percent of the Greek city-states of the time—that is, five percent.

Although the Kristonia Bank undermined the rules of the banking industry of the Greek city-states, Amendolara and Turii at that time were not obstructed by the wealthy merchants, but because of its low-interest loans, countless families and small workshops were supported, and they got out of the initial predicament, thus winning the reputation of the Kristonia Bank. Today's Ionian trade is not what it used to be, and some merchants have started to open banks, and have been forced to take out low-interest loans within the Union, but the Kristonia Bank has made its brand so popular among the Dionian people that people trust and appreciate it, so that there are often long queues at the door of the Kristonia Bank, and there are few customers in other banks. Normal competition is not possible, and it is even more impossible to play other means, and don't forget that behind Christoya's bank stands Davers, the only consul for life. So since there was no money to be made by running a bank in it, businessmen had to invest in other industries, and with the expansion of the Dionian League, there were many industries that made money, and the competition became fierce, but there was always only one bank.

Trito Demos looked at the man in front of him, he was already the most powerful man in Dionia at a young age, and he had a shrewd and beautiful wife who earned him a lot of wealth, which was really enviable!

Davers did not notice Trito Demose's strange gaze, his attention was all on the coin, he picked up two more silver coins, looked at them carefully, they were almost identical, and he asked with concern, "What do you think of the style and pattern of this Dionian silver coin compared to the Athenian silver coin?" ”

Athens' "owl" not only has high silver purity, but also exquisite patterns, even if Athens was defeated and the Delian League was dissolved, it could no longer force other city-states to use Laurion silver coins, but the merchants and people of the Greek city-states still used it voluntarily and consciously, and even many merchants went to Athens to exchange this kind of coin, put it in their own homes, and use it as a work of art. Therefore, the Laurion silver coin of Athens was the most widely circulated and most used hard currency in the Greek city-states.

"I have repeatedly compared more than a dozen Laurion silver coins struck from different years with others on the Mint, and they all agree that our Dionic coins are no less pure and engraving! And—" Tritodermus picked up the silver coin, rubbed it against the raised rim of its edge, and said excitedly, "Your Archon, this is a wonderful suggestion, for instead of the traditional method of making intricate and rough zigzags, we have used simple piping, which not only improves efficiency, but is not easy to wear and tear to use, and everyone thinks that it is as thick and generous as the pillars of the temple!" I believe that once the Ionian silver coin is issued, it will soon be liked by the public! Trito Demos said excitedly.

Davos's expression was calm, the previous design was his suggestion based on the characteristics of ancient Chinese coins, there was nothing to be proud of, he was more concerned about whether Dionian coins could quickly circulate and become the main currency used by the southern Italian city-states, which was not only to expand the influence of Dionia, but also to dominate the currency issuance rights of Greater Greece and control the economy and trade of the southern Italian city-states.

Just like Athens, even in the latter part of the Peloponnesian War, when trade shrank and finances shrank, and the Laurion silver mines produced less silver ore, did not reduce the purity of the "owls", and the Athenians' insistence on the monetary credit of the city-state paid off. Just a few years after the end of the war, more and more foreign merchants came to the port of Erekhovs, and the Athenian trade was now gradually returning to its former prosperity.

"Lord Trito Demoss, your Mint Committee has put a lot of effort into this little silver coin over the past few months! I am sure that when it is successfully released and accepted by the people of Great Greece, the Philosopher will leave your name! Hearing Davers's words of praise, Trito Demose suddenly became excited. With the completion of the Hades Temple, some special architectural structures in the temple are also spread among the people, such as the temple has two side halls, one is called Valhalla, which is dedicated to the warriors who sacrificed to guard the safety of the alliance, and the other is called the Temple of the Sages, and the names of citizens who have made outstanding contributions to the alliance will be engraved in the temple...... It is said that this is a Davers design. As a citizen of the Alliance, especially the veterans, who do not want to be famous in history, it is inevitable that Trito Demos will not be able to control his emotions and be happy.

At this time, a dissatisfied voice sounded: "Since it is all the credit of the Mint Committee, and there is nothing to do with our Institute of Mathematics, what are you going to do next'Amendolara Primitive Citizen Medal'...... And so on, don't look for us again! Trito Demos looked back and saw that it was Matticoris, and hurriedly said to Davers: "The fact that such a beautiful coin can be made is also thanks to the mathematical institutes of Matticoris and Mentoticeels, if not the coinage die they designed, and the hydraulic ...... Hydraulic ......"

"It's a hydraulic press!" Mattikoris added impatiently.

Trito Dermos coughed in embarrassment and said, "It's because they've designed these wonderful tools that we've made so beautiful coins!" Not to mention that it is better than the coins designed by Pythagoras for Metapontum, even the famous Athens coins of Greece! ”

"It's not all our work...... said that their skills were superior to that of their ancestor Pythagoras, and the always steady Mentotik Els said modestly: "If it weren't for the inspiration of the waterwheel you designed for you, Lord Davers, we wouldn't have thought of using water power instead of manpower, but unfortunately the current of the Corati River is not strong enough to drive the large hydraulic hammer you mentioned last time, which can constantly beat large pieces of cast iron." ”

"Then see the dam." Davers blurted out.

"Dam?!" Mattikris's eyes lit up.

"We'll talk about that later." Now construction is taking place everywhere in the territory of Dionia, the resettlement of Asprarustum and Crimesa, the construction of the temple of Hades, the construction of roads, the transformation of the Crimesa swamp area, the construction of the Turiyi thermal baths...... There simply simply is more labor to build more demanding and complex dams. Davers then diverted the subject and said to Trito Demos: "Matticoris they will not compete with you for this merit, for they are destined to become the famous mathematicians of all Greece, and there will be statues of them in the Temple of the Magi!" ”

In the face of such high praise, Matticoris was also a little embarrassed, he stroked his head and smiled. Beside him, Mentotik Els's performance, although more steady, could not hide the excitement on his face.

Sending Trito Demos away, only two guests were left in the living room, Matticoris and Mentoticeels. As early as last year, with their exploits in the manufacture of watermills and the free popularization of mathematics among the people, Davers proposed the "Act on the Introduction of Gentile Scholars" at the Senate Council, which was passed (together with the previous "Doctor's Act" and the "Teachers' Act" approved later, later known as the three major bills of Dionysa to transform the quality of citizenship, and over time, the cultural center of the Mediterranean gradually moved westward, This is a later story), making them full citizens of Dionia.

Although they studied mathematics in Tarantum, they were not citizens of Tarantum, but Leotini of the Sicilian city-state, only because they loved mathematics and admired Pythagoras since childhood, so they stayed in Tarantum for a long time, and because their homeland was occupied by Syracuse, they actually became homeless, which is the main reason why the Pythagoreans let them come to Amendolara in the first place, because they were insignificant to the school. However, in the Dionian League, their status has changed dramatically, not only have land and housing, but also respected, Davers also privately funded the construction of a mathematical institute for them, providing assistants, slaves, and various materials and funds for free, so that they are not disturbed by the outside world, and devote themselves to the theoretical research and practical application of mathematics.

The mathematicians of this era did not only study mathematics, but also involved in other scientific fields such as physics and astronomy, such as Pythagoras had his own creative ideas on music and aesthetics, and the famous "golden section" was first proposed by him. For this reason, Davers occasionally made some requests to the Institute of Mathematics, and Matticollis was happy to put aside his research for the time being to complete the tasks assigned by Davers, not because of the power of the archons, but because the various instruments conceived by Davers often involved the application of some complex and even novel mathematical and physical knowledge, which was of great benefit to them in consolidating and studying the theories of mathematics and physics.