Obverse and reverse in the context of "Coin"

The Serdi were a Celtic tribe inhabiting Thrace. They were located around Serdica (Bulgarian: Сердика, romanized: Serdika; Latin: Ulpia Serdica; Greek: Σαρδική o Σαρδῶν πόλις, romanized: Sardike o Sardon polis), now Sofia in Bulgaria, which reflects their ethnonym. They would have established themselves in this area during the Celtic migrations at the end of the 4th century BC, though there is no evidence of their existence before the 1st century BC. Serdi are among traditional tribal names reported into the Roman era. They were gradually Thracianized over the centuries but retained their Celtic character in material culture up to a late date. According to other sources they may have been simply of Thracian origin; according to others they may have been of mixed Thraco-Celtic origin.

The Naqsh-e Jahan Square (Persian: میدان نقش جهان, romanized: Maidān-e Naqsh-e Jahān, lit. 'Image of the World Square'), also known as the Shah Square (میدان شاه) prior to 1979, and sometimes known as the Imam Square, is a square situated at the center of Isfahan, Iran. Constructed between 1598 and 1629, it is now an important historical site, and one of UNESCO's World Heritage Sites. It is 160 metres (520 ft) wide by 560 metres (1,840 ft) long – an area of 89,600 square metres (964,000 sq ft). The square is surrounded by buildings from the Safavid era. The Shah Mosque is situated on the south side of this square. On the west side is the Ali Qapu Palace. Sheikh Lotfollah Mosque is situated on the eastern side of this square and at the northern side Qeysarie Gate opens into the Isfahan Grand Bazaar. Today, Namaaz-e Jom'eh (the Muslim Friday prayer) is held in the Shah Mosque.

The square is depicted on the reverse of the Iranian 20,000 rials banknote. Stores are owned by trust of Ostandari Isfahan.

The Morgan dollar is a United States dollar coin minted from 1878 to 1904, in 1921, and beginning again in 2021 as a collectible. It was the first standard silver dollar minted since the passage of the Coinage Act of 1873, which ended the free coining of silver and the production of the previous design, the Seated Liberty dollar. It contained 412.5 Troy grains of 90% pure silver (or 371.25 Troy grains = 24.057 g; 0.7734 ozt of pure silver). The coin is named after its designer, United States Mint Assistant Engraver George T. Morgan. The obverse depicts a profile portrait representing Liberty, modeled by Anna Willess Williams, while the reverse depicts an eagle with wings outstretched. The mint mark, if present, appears on the reverse above between D and O in "Dollar".

The dollar was authorized by the Bland–Allison Act. Following the passage of the 1873 act, mining interests lobbied to restore free silver, which would require the Mint to accept all silver presented to it and return it, struck into coin. Instead, the Bland–Allison Act was passed, which required the Treasury to purchase between two and four million dollars' worth of silver at market value to be coined into dollars each month. In 1890, the Bland–Allison Act was repealed by the Sherman Silver Purchase Act, which required the Treasury to purchase 4,500,000 troy ounces (140,000 kg) of silver each month, but only required further silver dollar production for one year. This act, once again, was repealed in 1893.

The Dutch East India Company (Dutch: Vereenigde Oostindische Compagnie, often known as VOC) was a chartered company which issued a considerable series of coinage in bronze, silver and gold for its territories in the Far East between 1602 and 1799.

In Greek mythology, Strymon (/stryˈmɔːn/; Ancient Greek: Στρυμών) was a river-god and son of the Titans Oceanus and his sister-wife Tethys. He was a king of Thrace. By the Muses, Euterpe or Calliope or Terpsichore, he became the father of Rhesus. His other sons were Olynthus and Brangas.

Neaera bore Strymon's daughter, Evadne who became the wife of King Argus. He was also the father of Tereine who mothered Thrassa by the god Ares. Another daughter, Rhodope became the mother of Athos by Poseidon.

Coinage of the Ptolemaic kingdom was struck in Phoenician weight, also known as Ptolemaic weight (about 14.2 grams) which was the weight of a Ptolemaic tetradrachm. This standard, which was not used elsewhere in the Hellenistic world, was smaller than the dominant Attic weight (about 17.28 grams) which was the weight of standard Hellenistic tetradrachm. Consequentially, Ptolemaic coins are smaller than other Hellenistic coinage. In terms of art, the coins, which were made of silver, followed the example set by contemporary Greek currencies, with dynastic figures being typically portrayed. The Ptolemaic coin making process often resulted in a central depression, similar to what can be found on Seleucid coinage.

The Ptolemaic dynasty introduced standard coinage to Egypt, where pre-existing native dynasties made only very limited use of coins. Egyptian gold stater was the first coin ever minted in ancient Egypt around 360 BC during the reign of pharaoh Teos of the 30th Dynasty. These coins were used to pay salaries of Greek mercenaries in his service.

There are eight euro coin denominations, ranging from one cent to two euro (the euro is divided into a hundred cents). The coins first came into use in 2002. They have a common reverse, portraying a map of Europe, but each country in the eurozone has its own design on the obverse, which means that each coin has a variety of different designs in circulation at once. Four European microstates that are not members of the European Union (Andorra, Monaco, San Marino, and Vatican City) use the euro as their currency and also have the right to mint coins with their own designs on the obverse side.

The coins, and various commemorative coins, are minted at numerous national mints across the eurozone to strict national quotas. Not every eurozone member state has its own mint. Obverse designs are chosen nationally, while the reverse and the currency as a whole is managed by the European Central Bank (ECB).

The United States ten-dollar bill (US$10) is a denomination of U.S. currency. The obverse of the bill features the portrait of Alexander Hamilton, who served as the first U.S. secretary of the treasury, two renditions of the torch of the Statue of Liberty (Liberty Enlightening the World), and the words "We the People" from the original engrossed preamble of the United States Constitution. The reverse features the U.S. Treasury Building. All $10 bills issued today are Federal Reserve Notes.

As of December 2018, the average life of a $10 bill in circulation is 5.3 years before it is replaced due to wear. Ten-dollar bills are delivered by Federal Reserve Banks bound with yellow straps.