Overview
Silberkreis is a name attached to a district of Svartrau, the capital city of Vale Sangora. It comes from community documentation of pre-release gameplay footage, where it is given as the district the cathedral sits in. The name has not appeared in any studio post, trailer, storefront listing or developer interview, and the spelling is not stable even in the places it does turn up, appearing as both Silberkreis and Silverkreis. Treat the name as provisional until the game ships.

What Is Actually Documented
The city around it is on firmer ground. Svartrau is the capital and largest settlement of the valley and the seat of Brencis's political power. It grew where it did because the surrounding mountains are rich in silver, and the slopes are pockmarked with the entrances of the Silver Mines. Greifberg castle stands on the crags above the city.
The cathedral shown in the footage is Svartrau Cathedral. Preview material describes the same building being approached two ways, open to the public in daylight and entered by an upper balcony after dark, with a different set of objectives on each route. A Murohni, one of the failed vampires created when a vrakhiri fang lodges somewhere other than the victim's heart, is documented in the cathedral complex in the same build. None of that has been tied to a district name by the developers.
Day and Night
The day and night contrast is confirmed for the city as a whole rather than for any one quarter of it. By day the streets are populated and public, with conversations running in the open that a player can walk into. After dark the city empties, merchants shut up, residents sleep, and patrols move through, while rooftops and hidden ways become usable. Reports from hands-on sessions add that a high infamy escalates the response, drawing bounty hunters and a heavier military presence, and community accounts go further and describe curfews restricting access to traders. The curfew detail is not confirmed.
Claims to Treat With Caution
That Silberkreis is the wealthiest district in the valley, or that it sits closest to Greifberg castle. Neither statement appears in any studio material.
That the name translates as silver circle and refers to the valley's mining wealth. The silver wealth is confirmed for Svartrau; the connection to this name is not.
Any contrast drawn between it and The Middens, which is itself undocumented outside community listings.
That the district is a separate explorable area at all, rather than a label used in one presentation for part of the city.
Status of This Page
This page exists because the name circulates in pre-release coverage, not because the place is confirmed. It stays short on purpose. Now that the game has released and the city can be walked, the district can either be described properly or the name retired.