Finland’s largest Viking silver hoard came out of the ground in two buried containers

A metal detectorist searching farmland near the church village of Sysmä, in southern Finland, has turned up what researchers now describe as the largest Late Iron Age coin hoard ever recorded in the country. The silver, split between two buried containers, weighs about 4.5 kilograms and is believed to hold several thousand individual coins.

The discovery was made on 3 September by hobbyist Kalle Lappinen, who has detected on and off since the late 1990s and returned to the pastime in 2017. Archaeologists inspected the find spot the following day and recovered the hoard under the direction of Esko Tikkala, an archaeologist with the regional museum authority.

A signal that almost got abandoned

Lappinen had searched the same stretch of ground before without success, and initially walked away from the signal that led to the hoard because it registered as coming from unusually deep in the soil, which he took for a mineral reading rather than a buried object. He kept digging anyway and reached about ten silver coins waiting at the bottom of the hole. A second, matching signal turned up about eight metres away. Lappinen reported the find immediately to the Finnish Heritage Agency, whose specialists then carried out the full excavation. “First came a little disbelief, then the adrenaline and the feeling of success,” he said of the moment the scale of the find became clear. He calls the site one of his regular search spots, drawn to it partly because its terrain resembles the location of an earlier Iron Age silver hoard found by two brothers in nearby Asikkala, who kept that discovery quiet for a year and a half before it became public in June. Most signals, he has said, lead nowhere: about 99 per cent of what a detector flags turns out to be scrap metal or natural ore rather than archaeology, which is part of why the Sysmä find caught him off guard.

A find split between two containers

What sets the Sysmä hoard apart from most Viking-Age silver finds in Finland is that the valuables were not buried together. The coins and accompanying objects had been packed into two birch-bark containers and buried around 45 centimetres deep, wedged among stones roughly 12 metres apart. One of the two containers broke apart as it was carefully excavated. Lahti Museums director Tuulia Tuomi has pointed to the preservation of the bark itself as one of the more unusual aspects of the find, noting that organic material of this kind rarely survives from Finland’s prehistoric period.

More than coins alone

Alongside the silver coins, the two deposits contained a fragment of hacksilver, a silver bracelet, a silver mount and a silver bead. According to Lahti Museums, the coins have not yet been cleaned, separated or counted, so their precise number, combined weight and dating will only become clear once conservation work is complete. Researchers already expect the total to run into the thousands. Silver in this period circulated as much by weight as by face value, which is why Viking-Age hoards elsewhere in the Baltic region typically mix coins with cut fragments and jewellery rather than holding currency alone.

Surpassing a 130-year-old record, in a smaller league than Gotland

Finland’s previous largest known Viking-Age coin hoard was unearthed in Nousiainen in 1895 and contains roughly 1,700 coins along with other objects, together weighing about 2.2 kilograms. The Sysmä coins alone, at roughly 4.5 kilograms, weigh more than double that entire assemblage, even before conservators have finished separating the individual pieces. The find is modest next to the Baltic region’s largest hoards, however: the Spillings Hoard, recovered on the Swedish island of Gotland in 1999, contained about 67 kilograms of silver and more than 14,000 coins, a scale tied to Gotland’s outsized role in Viking-Age trade networks.

Ground with a silver history

The Sysmä area was not unknown to researchers before this find. Earlier discoveries from the district include part of a Samanid dirham, or an imitation of one, dating to the early tenth century, along with silver pieces imitating Byzantine coin types. Those finds already showed that silver with connections far beyond Finland had reached the area during the Viking Age, and researchers now want to establish whether the newly recovered coins fit the same pattern or reflect different sources once they are cleaned and identified. Lappinen, who has previously reported smaller Iron Age objects tied to burial sites, says his longer-term ambition is to locate an as-yet-undocumented cemetery somewhere in the Sysmä area, a find he believes recent advances in ancient DNA analysis could make unusually informative for researchers studying the region’s Late Iron Age population.

What happens next

The coins now move into conservation, where specialists will clean, separate and identify each piece before attempting to establish the hoard’s precise chronology and composition. Only once that work is finished will researchers be able to say with confidence when the silver went into the ground, whether both containers were buried at the same time, and what the discovery can add to the wider picture of Viking-Age Finland. The find, first reported in the days after its recovery, is expected to remain under study for some time before Lahti Museums publishes a fuller account of its contents.

This article was produced with the assistance of AI and reviewed by Morning Overview editors prior to publication.

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