Question: What is the currency of the group that built The Temples of Humankind ?

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List of Jain temples: Jain temples and "tirtha" (pilgrimage sites) are present throughout the Indian subcontinent, many of which were built several hundred years ago.  Many of these temples are classified according to Jain sects.  Idols of tirthankaras are present in these temples.  Many Jain temples are found in other areas of the world.  This article lists and documents prominent Jain temples and Tirthas around the world.

Bhutanatha group of temples, Badami: The Bhutanatha group of temples is a cluster of sandstone shrines dedicated to the deity Bhutanatha, in Badami town of Karnataka state, India.  There are two major temples here.  Temple No.1, on the east side of the lake, called the Bhutanatha temple has a superstructure that resembles early South Indian style or North Indian style with its open mantapa (hall or Veranda) extending into the lake, while the smaller Temple No.2 on the north-east side of the lake, sometimes called the Mallikarjuna group of temples, has a stepped superstructure, commonly found in Kalyani Chalukya constructions.  The inner shrine and mantapa (hall) of Temple No.1 were constructed in the late 7th century, during the reign of the Badami Chalukyas.  While the outer "mantapa", facing the Badami tank, was completed during the rule of the Kalyani Chalukyas of the 11th century.  Hence the Bhutanatha temple contain architectural forms from different periods.  Studies show that these Kalyani Chalukya architects could have belonged to the same early phase workshop, that later built the nearby Yellamma temple and the Mallikarjuna group of temples.

Birla Mandir: Birla Mandir (Birla Temple) refers to different Hindu temples or Mandirs built by the Birla family, in different cities.  All these temples are magnificently built, some of them in white marble or in sandstone.  The temples are generally located in a prominent location, carefully designed to accommodate a large number of visitors.  The worship and discourses are well organized.  The first one was built in 1939 in Delhi collectively by Ghanshyamdas Birla and his brothers, as well his father.  Later temples have been built by, and are managed by different branches of the family.

Temples of Humankind: The Temples of Humankind are a collection of subterranean temples buried 100 ft underground built by the Federation of Damanhur.  They are decorated in several motifs stressing peaceful human collaboration.  The Temples are located in the foothills of the Alps in northern Italy, 30 mi from Turin, in the valley of Valchiusella.

Puthia Temple Complex: The Puthia Temple Complex consists of a cluster of notable old Hindu temples in Puthia Upazila, Rajshahi District, Bangladesh.  Located 23 km to the east of Rajshahi city, it has the largest number of historic temples in Bangladesh.  The temples were built by Hindu Zamindars Rajas of the Puthia Raj family who were noted philanthropists of Rajshahi.  The temples have been built in terracotta in a variety of styles combining the typical Jor-bangla architecture with other influences.  The Rajbari or Palace of the Raja of Puthia and the Dol Mancha are part of the complex.  The temples are laid out around a lake with a sprawling lawn.

Temple (Latter Day Saints): In the Latter Day Saint movement, a temple is a building dedicated to be a house of God and is reserved for special forms of worship.  A temple differs from a church meetinghouse, which is used for weekly worship services.  Temples have been a significant part of the Latter Day Saint movement since early in its inception.  Today, temples are operated by several Latter Day Saint denominations.  The most prolific builder of temples of the Latter Day Saint movement is The Church of Jesus Christ of Latter-day Saints (LDS Church).  There are 157 operating temples (which includes 2 previously dedicated, but closed for renovation), 12 under construction, and 13 announced (not yet under construction).  Several other variations of the church have built or attempted to build temples.  The Community of Christ operates two temples in the United States, which are open to the public and are used for worship services, performances, and religious education.  Other denominations with temples are the Apostolic United Brethren, the Church of Christ, the Fundamentalist Church of Jesus Christ of Latter-Day Saints and the Righteous Branch of the Church of Jesus Christ of Latter-day Saints.

Maluti temples: Maluti temples are a group of 72 extant terracotta temples (out of the original number of 108), located in the Maluti village near Shikaripara in Dumka District on the eastern part of the Chota Nagpur Plateau, Indian state of Jharkhand.  These temples, according to the Indian Trust for Rural Heritage and Development (ITRHD), were built between the 17th and 19th centuries.  The kings of Baj Basanta dynasty built these temples in Maluti, their capital, inspired by goddess Mowlakshi, their family deity.  Many of the temples are deified with different denominations of gods and goddesses, apart from the tutelary deity Mowlakshi, and others such as Shiva, Durga, Kali and Vishnu.  The Global Heritage Fund (GHF) has proposed a conservation effort, which would increase tourism to the Maluti village.  GHF has declared this site as one of the world’s 12 most endangered cultural heritage sites.

Iconography of Shiva temples in Tamil Nadu: Iconography of Shiva temples in Tamil Nadu is governed by the Shaiva Agamas (IAST:Āgama) that revere the ultimate reality as the Hindu deity, Shiva.  Āgama (Sanskrit: आगम, Tamil:ஆகமம்) in the Hindu religious context means a traditional doctrine or system which commands faith.  Temple worship according to Āgamic rules can be said to have started during the Pallava dynasty (551-901 A.D.) in South India, but they were fully under establishment during the Chola dynasty (848-1279 A.D.) The temples during the Chola period expanded to Sri Lanka and islands in South East Asia.  The temple complex was expanding with niches for various deities on the stipulated sides of the sanctum. " Lingam" was universalised and "prakarams" (precincts) with subsequent deities came up.  The temple "parivara"(deities related to primary deity) expanded considerably during the Chola period.  The niches of following Āgamic rules for building Shiva temples in Tamil Nadu, a South Indian state continues even in the modern era.  Some of the prime images like that of "lingam", Vinayagar and Parvati are present in all the Shiva temples.  Almost all the temples follow the same custom during festivals and worship methods with minor exceptions.  Most of the Shiva temples in Tamil Nadu and Sri Lanka (like Munneswaram temple, Koneswaram temple, Tennavaram temple, Ketheeswaram temple, Naguleswaram) are built in Dravidian architecture.

Group of temples at Talakad, Karnataka: The Group of temples at Talakad, located about 45 km south-east of the culturally important city of Mysore in the Karnataka state of India are ancient Hindu temples built by multiple South Indian dynasties.  Archaeological excavations of the sand dunes at Talakad (or Talakadu) have shown the existence of several ruined temples built during the rule of the Western Ganga dynasty (c.345-999).  However, according to historian I. K. Sarma, only two temples, the Pataleshvara (also spelt Patalesvara) and Maraleshvara (also spelt Maralesvara), built during the reign of King Rachamalla Satyavakya IV (r.975-986) are intact.  According to the Archaeological Survey of India (ASI), the Vaidyeshvara temple (also spelt Vaidyesvara), the largest, the most intact and ornate of the group bears Ganga-Chola-Hoysala architectural features.  Its consecration is assignable to the 10th century with improvements made up to the 14th century.  According to the art historian Adam Hardy, the Kirtinarayana temple (also spelt Keertinarayana) was built in 1117 A.D. by the famous Hoysala King Vishnuvardhana to celebrate his victory over the Cholas in the battle of Talakad.  It has currently been dismantled by the ASI for renovation.  Only its "mahadwara" ("grand entrance") is intact.  The Sand dunes of Talakad are protected by the Karnataka state division of the ASI.  The Vaidyeshvara and Kirtinarayana temples are protected as monuments of national importance by the central Archaeological Survey of India.

Federation of Damanhur: The Federation of Damanhur, often called simply Damanhur, is a commune, ecovillage, and spiritual community situated in the Piedmont region of northern Italy about 30 miles (50 km) north of the city of Turin.  It is located in the foothills of the Alps in the Chiusella Valley, bordering on the Gran Paradiso National Park.  The community has its own constitution and currency, the "Credito".

Supporting paragraphs: Temples of Humankind Federation of Damanhur
Answer: the "Credito".