In Wasiliszki Stare there is a neo-Gothic church of Sts Peter and Paul, built in 1903. According to Anna Lewkowska, Jacek Lewkowski and Wojciech Walczak, "embedded in the church's plinth are granite slabs with inscriptions (now smeared with cement), containing the names of the temple's co-founders. Some of the slabs probably come from the old parish cemetery. One legible one has the inscription: "LUDWIK SYN ANTONIEGO SKINDER / DIED DECEMBER 9, 1873" In the church square by the fence wall stands the only gravestone - a stele of black granite on the grave of Father Teofil Pryszmont (d. 1957), dean of Wasilish."

The aforementioned authors also report on the active Catholic cemetery in Wasiliszki Stare. It has a rectangular plan and a 1 ha area fenced with a wooden fence. It was established in the second half of the 19th century. No tombstones have survived from that time, possibly embedded in the base of the church. Quoting the aforementioned researchers, "the oldest tombstones in the cemetery date from the 1st half of the 20th century. The predominance of unstylish concrete and terrazzo tombstones nowadays is from the 2nd half of the 20th century". In the central part of the cemetery a cross with an inscription commemorating the fallen Home Army soldiers was placed in 1993.