 The "Lapp church" of Sodankylä (c. 1689), Finland's best-preserved and least changed wooden church, is a simple, unpainted rectangular saddle-back-roofed block, measuring 13 x 8,5 metres with the walls rising to 3,85 metres, and resembling a peasant dwelling.By contrast, Petäjävesi church (planned and built by master builder Jaakko Klemetinpoika Leppänen, 1765) plus the additional sacristy and belfry (Erkki Leppänen, 1821) (a World Heritage Site), though also unpainted on the exterior, has a refined cross plan with even-sized arms, 18 x 18 metres, with a 13-metre-tall interior wooden vault.The atmosphere of the interior of Petäjävesi church is regarded as unique; the large windows, unusual for log construction, give it a soft light.