A restored 1901 townhouse and a new build townhouse topped Brooklyn’s luxury market last week. The previous week saw 19 such contracts with a total asking volume of $55 million. During the same week last year, 21 luxury contracts were signed in the borough for $59 million. The top contract last week went to a historic Park Slope townhouse at 448 Sixth Street asking $6.5 million. The second priciest listing went to a new townhouse in Williamsburg at 196 Withers Street asking $3.75 million.