The George Lindemann Journal by George Lindemann

AFTER thieves broke into the Kunsthal Museum in Rotterdam, the Netherlands, on Monday night and stole a king’s ransom’s worth of paintings by the likes of Picasso, Monet, Matisse and Gauguin, the public and the press were shocked. As usual, a combination of master art thieves and faulty security was blamed. But this seductive scenario is often, in fact, far from the truth.

Most of us envision balaclava-clad cat burglars rappelling through skylights into museums and, like Hollywood characters, contorting their bodies around motion-detecting laser beams. Of course, few of us have valuable paintings on our walls, and even fewer have suffered the loss of a masterpiece. But in the real world, thieves who steal art are not debonair “Thomas Crown Affair” types. Instead, they are the same crooks who rob armored cars for cash, pharmacies for drugs and homes for jewelry. They are often opportunistic and almost always shortsighted.

Take the 1961 theft of Goya’s “Duke of Wellington” from the National Gallery in London. While all of Britain believed that the Goya was taken by cunning art thieves, it was actually taken by a retired man, Kempton Bunton, protesting BBC licensing costs. (He apparently stole the painting by entering the museum through a bathroom window.) In 1973, Carl Horsley was arrested for the theft of two Rembrandts from the Taft Museum in Cincinnati. Later, after serving a prison term, he was arrested for shoplifting a tube of toothpaste and some candy bars.

The illicit trade of stolen art and antiquities is serious, with losses as high as $6 billion a year, according to the F.B.I. There have been teams of thieves who have included art among their targets, like the ones who stole a Rembrandt self-portrait from the National Museum in Stockholm in 2000. (The only buyer they found was an undercover F.B.I. agent.) But in general, it is incredibly rare for a museum to fall victim to a “professional” art thief. The reason is simple: the vast majority of people who steal art do it once, because it is incredibly difficult and because it is nearly impossible to fence a stolen masterpiece.

The wide attention that a high-value art heist garners makes the stolen objects too recognizable to shop around. And there are very few people with enough cash to purchase a masterpiece — even for pennies on the dollar — that they can never show anyone. Once an art thief realizes this, he turns to other endeavors. Meanwhile, the stolen treasures lie dormant in a garage or crawl space until he figures out what to do with them.

It’s easy — and sometimes justified — to criticize security systems as flawed or inadequate, but securing a museum is uniquely challenging. Consider this: The goal of an art museum is to make priceless and rare art and antiquities accessible to the public. They are among society’s most egalitarian institutions. Contrast that with a jewelry store or a bank, where armed guards and imposing vaults are the norm. No one expects to be able to be alone with diamonds worth thousands, but museumgoers do expect an intimate experience with masterworks worth millions. Clearly, it is a daunting task to provide robust security without disturbing the aesthetics of the artwork and its environment.

So what is the remedy for the all-too-frequent scourge of art theft? Museums must build systems that cannot be compromised by a single error or failure. Thieves should have to overcome several layers of security before they can reach their target and several more on the way out. At the Isabella Stewart Gardner Museum, we took such an approach after the 1990 theft of several masterpieces — a crime that hasn’t been solved. This not only makes it more difficult to steal and get away with stolen art, but it gives the police precious extra minutes to respond to alarms, especially if, as in Rotterdam, they sound at night.

When art is stolen, local law enforcement should focus on the right sort of criminals rather than conjecture about multinational art theft rings. The key to finding these missing needles in the haystack is to make the haystack smaller; homing in on the most likely suspects quickly is essential to recovering the stolen item. The F.B.I.’ s Art Crime Team has gathered impressive intelligence on who steals art and what becomes of it. For instance, they’ve learned that upward of 90 percent of all museum thefts involve some form of inside information. So often the best approach is to look at active local robbery gangs, and to investigate connections between past and present employees and known criminals. Enhanced employee background checks and discreet observation of visitor behavior also help to deter thefts.

Confronting these realities is essential to preventing more pieces of our cultural heritage from being lost.

PARIS — With impeccable timing and taste, thieves in the wee hours of Tuesday morning plundered an art museum in the Netherlands that was celebrating its 20th birthday and made away with seven borrowed paintings, including valuable works by Picasso, Monet, Gauguin, Matisse and Lucian Freud.

The Kunsthal museum in Rotterdam — which was exhibiting a private collection owned by the Triton Foundation — was closed to the public after the theft, but the bare spaces on its walls were visible to photographers through windows in its modern building by Rotterdam’s museum park and busy Maasboulevard.

The theft was the latest alarm about museum security in Europe, now a prime hunting ground for art thieves. In 2010 five paintings, including a Picasso and a Matisse, together valued at about 100 million euros, or about $130 million, were stolen from the Musée d’Art Moderne in Paris; they are still missing.

Police investigators combed the grounds of the museum and studied surveillance video for clues to the burglary, which they said happened about 3 a.m. and set off an alarm linked to a security agency. But by the time police arrived soon after, the works had vanished.

The art, part of a collection amassed by a Dutch investor, Willem Cordia, who died in 2011, was exhibited in public for the first time last week at the Kunsthal, which does not have a collection of its own. The stolen paintings span parts of three centuries: Meyer de Haan’s “Self-Portrait” of 1890 and Gauguin’s 1898 “Girl in Front of Open Window”; Monet’s “Waterloo Bridge, London” and “Charing Cross Bridge, London,” both from 1901; Matisse’s 1919 “Reading Girl in White and Yellow” and Picasso’s 1971 “Harlequin Head”; and Freud’s haunting 2002 portrait “Woman With Eyes Closed.”

The theft “was carefully thought out, cleverly conceived and it was quickly executed, so that suggests professionals,” said Charles Hill, a retired Scotland Yard art detective turned private investigator who went undercover to retrieve a version of “The Scream,” by Edvard Munch, after it was stolen in 1994 in Oslo.

“The volume,” he added, “suggests that whoever stole it owes somebody a lot of money, and it’s got to be a major-league villain.”

“My best guess is that someone doesn’t have the cash to repay a loan,” he said.

Marc Masurovsky, a historian and an expert on plundered art in Washington, noted the possibility that the theft was “a contract job,” adding: “These works were picked out. Could it be they had been targeted well before the theft, and the exhibit was the opportunity to strike?”

Willem van Hassel, the chairman of the Kunsthal’s board, announced the closing of the museum on Tuesday and later held a news conference to declare that adequate security measures had been taken.

At the same conference, the museum’s director, Emily Ansenk, said that night measures involved “technical security,” with no guards but camera surveillance and alarms. Museum officials said that the police had arrived on the museum grounds within five minutes of the alarm.

Ms. Ansenk told reporters that the burglary “has hit the art world like a bomb” and described it “as a nightmare for any museum director.” Kunsthal officials declined to estimate the value of the stolen works, though experts say they are collectively worth many millions of dollars, possibly hundreds of millions. Still, it would be difficult for thieves to sell such easily identifiable artworks, contributing to suspicions about underworld finances.

“I think it’s a form of repayment in kind, a barter — 'I don’t have cash, but I have these paintings,’ ” said Mr. Hill, the art investigator.

Kunsthal officials vowed that the museum would reopen on Wednesday.

-By DOREEN CARVAJAL

Banker Herb Allen's family plans to auction one of Monet's water lily paintings for between $30 million and $50 million. Collectors are buying famous works on hopes they retain their value in the current economy.

In another sign that the smart money set is selling art this auction season, Christie's plans to auction off a Claude Monet painting of a water lily pond for between $30 million and $50 million. The painting was donated to a school by the family of investment banker Herb Allen.

The planned sale next month comes as prices for Monet's watery scenes continue to climb, buoyed by interest from emerging collectors in China and Europe who think values for name-brand artists will hold up during times of economic uncertainty even if prices for lesser-known painters plummet.

Monet's Water-Lily series—the artist painted more than 160 views of his garden pond at Giverny, France between 1905 and his death in 1926—seem particularly popular. Five of the artist's priciest paintings at auction depict his garden, including "The Lily Pond," a 1919 example that Christie's auction house sold to a European buyer for $80.4 million at the peak of the last market in 2008.

"Water Lilies," a painting that dates from 1905 and shows mint-green lily pads bobbing atop a periwinkle pool, will be offered at Christie's evening sale of Impressionist and modern art in New York on Nov. 7.

Christie's specialist Conor Jordan said Chinese interest is already piqued by "Water Lilies," so he's shipping it to Hong Kong next week so potential bidders can take a closer look.

Mr. Allen, the founder of the annual mogul-fest in Sun Valley, Idaho, said his father bought the painting in 1979 with his wife, Ethel Strong Allen. After Mr. Allen's father died in 1997, the painting remained in the collection of his stepmother, who died in June.

Mr. Allen said the school is also auctioning off a pair of Impressionist paintings by Camille Pissarro and Alfred Sisley that were included in his stepmother's bequest.

Pissarro's 1895 landscape, "Apple Trees and Haymakers, Eragny," shows a pair of women using pitchforks to rake hay into piles in an apple orchard near Pissarro's home in Eragny, France. Christie's estimates the work will sell for at least $2.5 million.

Pissarro's performance at auction has been patchy lately, with several works going unsold, but collectors tend to pay a premium for scenes like this one that show Pissarro's signature way of painting long, afternoon shadows.

Christie's also expects to get at least $2.5 million for Sisley's "Alley of Poplars at Moret on the Bank of the Loing," an 1890 view of a poplar-lined path near a riverbank in the French town of Moret. Sisley's auction record is similarly hit and miss these days, but his poplar series still seems to find plenty of takers: Seven of the artist's priciest works at auction feature riverbank views of Moret—including an 1891 example that broke the artist's auction record when it sold for $5.7 million at Sotheby's five years ago.

Mr. Allen said his stepmother's will bequested all three paintings to his prep-school alma mater, Hackley School, in Tarrytown, N.Y.

-By Kelly Crow