▁Maryland ▁Category : National ▁Register ▁of ▁Historic ▁Places ▁in ▁Som erset ▁County , ▁Maryland <0x0A> </s> ▁Dec la red ▁historic ▁buildings ▁of ▁H ang z hou ▁are ▁districts , ▁artifact s ▁or ▁buildings ▁leg ally ▁declared ▁to ▁be ▁" protected ". ▁According ▁to ▁the ▁" Reg ulations ▁of ▁historic ▁districts ▁and ▁historic ▁buildings ▁in ▁H ang z hou " ▁effective ▁from ▁ 1 ▁January ▁ 2 0 0 5 , ▁historic ▁buildings ▁are ▁those ▁artifact s ▁or ▁districts ▁that ▁have ▁last ed ▁more ▁than ▁ 5 0 ▁years , ▁and ▁of ▁significant ▁values ▁for ▁history , ▁science , ▁and ▁art ▁study . ▁In ▁H ang z hou , ▁declaring ▁a ▁historic ▁house ▁requires ▁consult ing ▁the ▁urban ▁planning ▁administration ▁b ureau , ▁and ▁the ▁real ▁estate ▁administration ▁b ureau . ▁ ▁As ▁of ▁ 3 1 ▁June ▁ 2 0 1 1 , ▁there ▁are ▁ 2 8 7 ▁declared ▁historic ▁buildings ▁in ▁H ang z hou , ▁proc laimed ▁as ▁ 5 ▁batch es .[ 1 7 ] ▁In ▁the ▁near ▁future , ▁it ▁is ▁going ▁to ▁issue ▁the ▁sixth ▁batch ▁which ▁includes ▁ 5 1 ▁historic ▁houses . ▁ ▁List ▁of ▁third ▁batch ▁of ▁declared ▁historic ▁buildings ▁in ▁H ang z hou ▁ 7 0 ▁buildings ▁were ▁declared ▁to ▁be ▁the ▁third ▁batch ▁of ▁historic ▁houses ▁in ▁H ang ▁Z hou , ▁in ▁March ▁ 2 0 0 7 . ▁The ▁following ▁information ▁is ▁provided ▁by ▁Real ▁Est ate ▁Administration ▁Bureau ▁& ▁Research ▁Institute ▁for ▁Historic ▁buildings ▁in ▁ ▁H ang