Today's installment of "Which celebrity's house was this?" involves the 2,394-square-foot house at 534 20th Street in Santa Monica, Calif., which sold in December for $2,895,000, just a year after its owner had purchased it for $2,626,000.

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We believe the seller most likely was a celebrity, because public records identify the seller as being something called the 20th Street Trust. And, the money manager who represented the seller is a fellow named Howard Altman, who has been the trustee for many celebrities over the years for their real-estate purchases and sales, including luminaries like Jennifer Garner and Dan Castellaneta.

Built in 1934, the three-bedroom, English country-style house is in Santa Monica's Gillette's Regent Square neighborhood and has two baths and sits on a 0.21-acre lot, according to public records. Features include a living room with hardwood floors and a fireplace, a recently expanded family room and breakfast area, French doors opening to a sunny backyard, a new pool, spa and stone landscaping, a step-down master suite with a large bath that opens to the back yard, and two additional bedrooms with a Jack and Jill bath, according to listing information. Other features include crown moldings and a newer roof, according to listing information.

Records show that the sale closed on December 13 and was recorded on January 10. The buyers (a married couple) are not celebrities.

The fine folks over at the Santa Monica Distress Monitor blog wrote about the house when it was on the market. They did not identify (or seem to know the identity of) the seller, and they stated their belief that the house was owned by "another flipper/speculator" who "is likely to be taking a loss" after having "cleverly updated" the house, including adding a kitchen. They calculated that the holding costs, taxes and agent commission alone cost $344,000, meaning that the seller undoubtedly lost money on the place. "So did they spend any money on this upgrading?" asked the Santa Monica Distress Monitor poster. "If they did (we think they spent at least some), then it is going to be adding entirely to the loss."

Check out an online listing sheet for the house -- complete with photos -- here.

So, dear readers, tell us, if you know: whose house was this?