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We assess the robustness of the two highest rungs of the "cosmic distanceladder" for Type Ia supernovae and the determination of the Hubble-Lema\^itreconstant. In this analysis, we hold fixed Rung 1 as the distance to the LMCdetermined to 1 % using Detached Eclipsing Binary stars. For Rung 2 we analyzetwo methods, the TRGB and Cepheid distances for the luminosity calibration ofType Ia supernovae in nearby galaxies. For Rung 3 we analyze various moderndigital supernova samples in the Hubble flow, such as the Cal\'an-Tololo, CfA,CSP, and Supercal datasets. This metadata analysis demonstrates that the TRGBcalibration yields smaller $H_0$ values than the Cepheid calibration, a directconsequence of the systematic difference in the distance moduli calibrated fromthese two methods. Selecting the three most independent possiblemethodologies/bandpasses ($B$, $V$, $J$), we obtain $H_{0}=69.9 \pm 0.8$ and$H_{0} =73.5 \pm 0.7$ km s$^{-1}$ Mpc$^{-1}$ from the TRGB and Cepheidcalibrations, respectively. Adding in quadrature the systematic uncertainty inthe TRGB and Cepheid methods of 1.1 and 1.0 km s$^{-1}$ Mpc$^{-1}$,respectively, this subset reveals a significant 2.0 $\sigma$ systematicdifference in the calibration of Rung 2. If Rung 1 and Rung 2 are held fixed,the different formalisms developed for standardizing the supernova peakmagnitudes yield consistent results, with a standard deviation of 1.5 kms$^{-1}$ Mpc$^{-1}$, that is, Type Ia supernovae are able to anchor Rung 3 with2 % precision. This study demonstrates that Type Ia supernovae have provided aremarkably robust calibration of R3 for over 25 years.

The value of the Hubble-Lema\^itre constant queried by Type Ia  Supernovae: A journey from the Cal\'an-Tololo Project to the Carnegie  Supernova Program