Constans. AR Siliqua, Rome — Ancient Coin

Auctions Marketplace BidArch Auctions Auction Houses Archives

Curated numismatic auctions, a trusted collector marketplace and a research archive built around attribution, provenance and transparent records.

Collect with confidence

Verified accounts, protected checkout and encrypted HTTPS access across BidArch.

Auction Alerts

Create your free account to choose email and SMS announcements.

Email address

Mobile phone numberCountry calling code

Company & Legal

›About Us ›Privacy Policy ›User Agreement ›Contact ›Distance Sales Agreement ›Returns & Refunds ›GDPR Data Protection ›Frequently Asked Questions ›Order Tracking ›Bank Transfer Notice

Explore BidArch

›Auctions ›Marketplace ›Auction Houses ›Research Archives ›Research Guides ›Sell with BidArch ›My Account ›Register

Contact

Emailinfo@bidarch.com Websitewww.bidarch.com

Mobile Apps

COMING SOON ON THEApp Store COMING SOON ONGoogle Play

Follow Us

Your connection is protected by HTTPS encryption.

© 2026 BidArch Auctions. All rights reserved.

VISAAMERICANEXPRESSPayPalWISEstripe

Availability is confirmed at checkout

Privacy Terms Support

Your privacy choices

Necessary cookies keep BidArch secure. With your permission, analytics help us improve the site and marketing cookies measure campaigns. See our Privacy Policy.

Constans. AR Siliqua, Rome — Ancient Coin