The Rijksmuseum in Amsterdam had to close online ticket sales due to the extremely high demand for its Johannes Vermeer retrospective show, the most comprehensive collection of his work ever exhibited with 28 of his 37 known paintings. The exhibition sold out within two days of opening, with thousands still searching for tickets before it closes on June 4. To accommodate demand, the museum extended its hours until 10 p.m on Thursday, Friday, and Saturday evenings, and is working hard to resolve the online ticketing problems. Tickets have been seen on auction sites like eBay for a markup of over 1,343% on the original price; the situation has prompted the museum to find a solution to its ticketing problems.